02 tacoma that wont start new fuel filter and has fuel to the throttle body will run if starting fluid then dies?
You have a fuel pressure problem it sounds like b/c you spray starting fluid & the car runs & then shuts off after the fluid has burned off. If you continued with this starter fluid - it would keep running. So if you had adequate fuel pressure - the car would run. Maybe faulty fuel pump or vacuum loss in fuel system not allowing fuel to flow where it is needed.
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What is wrong if you have replaced the fuel pump fuel filter and ignition module on a 1992 Tracker and it will still only run with starting fluid?
Answer . \nIt's probably the computer. Answer . \nit is most likely to be the map sencer located on hose coming from air cleaner.make sure hose does not have a hole in it. Answer . Replace the ECM capacitors that have burnt out or simply replace the ECM!. Answer . \nI have a 92 and th…e same things happened to me. got on the internet and looked up the ecmu repairs. called a guy in California and he told me word for word everything that was going wrong on my tracker. Basically a capisator in the computer melts down like an old battery and slowly wipes out more and more as it spreads. garanteed it to work, so I pulleed it out and sent it to him. $250 and 4 days later I was on the road taking all the parts i had tried back. sorry I don't remember the name of the place. also said it is a factory defect but the loophole is it doesn't go bad until 90,000-110,000 miles. told me all mitshubshi computers will do this eventually. He didn't recomend the junk yard because of the chance of getting another bad one is great. Hope this helps.. Answer . I had the same problem and found the solution to be same as the previous answer. Only difference was I had a mechanic who used a tracker as the shop vehicle so he turned me on to the answer and someone who would replace the computer with one he rebuilt. Unfortunately it cost me much more than the 250 he paid. (MORE)
You have a 91 Plymouth Voyager 4 cyl it was cutting out sounded like running on 2 cyl you changed the fuel filter plugs plug wires dist cap now it barely starts it wont idel dies when you let off gas?
Answer . 1. Inspect AIR CHARGE SENSOR \n\n Damaged or faulty air charge sensor or air \n\n\n\n\n \n charge sensor circuit.\n. \n2. Inspect AIR CLEANER TEMPERATURE SENSOR Damaged or faulty air cleaner temperature \n\n\n\n\n \n\n sensor or air cleaner temperature sensor \n\n\…n\n \n\n\n circuit.\n. \n3. Inspect BATTERY \n\n\n Insufficient battery voltage/amperage\n. \n5. Inspect CARBURETOR FLOAT \n\n Improperly adjusted/saturated or damaged \n\n\n\n\n \n\n carburetor float.\n. \n6. Inspect CHOKE PULLOFF\n \n Worn, defective, or faulty choke pulloff(s).\n. \n7. Inspect CHOKE THERMOSTAT \n\n Stuck or improperly functioning choke \n\n\n\n\n \n\n thermostat.\n. \n8. Inspect FUEL INJECTOR \n\n Plugged, dirty or poorly connected fuel \n\n \n\n\n \n\n injector.\n. \n9. Inspect FUEL INJECTOR COLD START VALVE Faulty cold start valve or circuit.\n. \n10. Inspect FUEL INJECTOR PRESSURE REGULATOR Faulty fuel injector pressure regulator or \n\n\n\n\n circuit.\n. \n11. Inspect ROTOR - IGNITION \n\n Damaged, worn, or corroded ignition rotor.\n. \n12. Inspect THROTTLE POSITION SENSOR \n Faulty throttle position sensor or throttle \n\n\n\n\n position sensor circuit.\n. \n13. Inspect VALVE \n\n\n Burned, worn or sticking exhaust valve(s).\n. \n14. Inspect TIMING SPECIFICATION \n Incorrectly adjusted engine timing.\n. \n15. Inspect TIMING CHAIN or BELT\n Slipped or worn timing chain or belt. (MORE)
What is wrong with a '94 Toyota 4 wheel drive pickup with new fuel pump and filter starts and runs perfect for about 7 seconds then sounds like it is losing fuel and dies?
Could be bad airflow sensor or (MAS) engine will start normally insafe mode, but then when it tries to read sensor it could rich/leanout depending on breakage.
if this is a 4.3 the fuel pump needs to be checked there needs to be at least 55 psi coming from the pump there is a valve on driver side of motor at the back of the throttle body looks like the top of a valve stem , you can get a pressure tester at auto parts store, if the pump is bad, replace pump… and sending unit if you don't the pump will go bad again. (MORE)
92 Camaro Rs and have just recently changed the fuel filter on it and after you did the car stopped starting you tried to start it by spraying starter fluid in the throttle body whats the problem?
First turn your key on and listen for the fuel pump to pressurize the lines. Then check to see if the fuel is leaking from the new filter. If it is you may have got the connection wrong. If that's the case your engine is not getting the proper fuel pressure to run. Hence its sucking air. If that doe…s not work you might have a bad fuel pressure regulator sensor that is bad. Its located by the TBI. Reference a Haynes manual for replacement. also if you did not fill the new filter with fuel then you have air in you system and engine will not run. so try taking it off and filling it with fuel and then replace it. Answer turning ignition on removes air from fuel lines and primes the fuel system. filling fuel filter with fuel is irrelevent, as lines need to be clear of fuel upon installation. leave ignition on after installation for roughly 30 seconds-one minute. this will prime the fuel lines and remove air and most water from the system. if problem continues, fuel injectors. this is a common problem in 90-92 camaros. if cannot start car, you'll need to replace every injector, as it's not cost-effective to diagnose every injector. roughly 300 dollars in quality parts, roughly 4 man hours of labor. if rough start that requires push on accelerator (try this), run the car with fuel injector cleaner. this should salvage you injectors. if this helps proformance, starting, then for the next 3-4 full tanks of gas, add stp injection cleaner for every tank of gas. be careful, as this does not restore your injectors, but it helps clear away deposits which are common in multi port injectors. Make sure the fuel filter is facing the right direction as if it's backwards, it will block any fuel from getting to the engine. (MORE)
Engine starts then runs rough when cold for 5 seconds then fine Only when vehicle has been parked for 5 or more hours changed plugs fuel filter PCV air filter and cleaned throttle body Any suggestions?
Answer . Hmm, if it only runs rough for 5 seconds, I doubt a coolant temperature sensor could do it. Any codes stored?\n. \nActually, I'm thinking you may have one or more injector leaking. Do you notice a puff of black smoke upon startup? Were the plugs carboned up at all? Does it take a littl…e longer than usual to start that first time? These might be indicators. (MORE)
Why does a 1988 Toyota Supra non-turbo start and then die and do the same if gas is sprayed directly into the throttle body after the fuel filter and fuel pump have been replaced?
Try replacing the fuel injectors. They are expensive but you may try RC injectors. www.rceng.com is the site to go to. They were a cheaper alternative to me...Hope they can help you too. Answer There's a good chance your fuel injectors are bad. I had the same problem and had them replaced, starts …and runs fine now. But, more then likely it wont be cheap, the injectors (OE ones) are around $180, good luck. Answer Ok I have an 87 Supra non-turbo and my car did the same thing. I came to find out that on the intake there is a valve with a wire hooked up to it. If this wire or cord I should say comes unplugged from this intake valve, then the car will crank and then die right after. Plug this back in and your car should run just fine.((((( your problem is one of 2 things. you have no fuel pressure feeding injector rail pump can be new but if there is no power feeding pump you have no pressure first check for crancking power to fuel pump. also check fuel pump relay also computer sends power to engage pump relay usually from cam or crank sensor. i never saw 6 electronic fuel injectors go bad at the same time check for fuel injector pulse signal going to injector you must unplug electrical plug to each injector go to auto zone and purchase a injector test light or what techs call a noid light plug in 1 injector at a time and have someone crank engine if noid ligt flash or pulses on or of the injector is receiving thetrigger to open the valve in the injector and send fuel to that cylinder if you have no injector pulse check every fuse in car for open circuit if all good scan computer for bad cam or crank sensor test relay then stat test fuel pum by temporarolly running fused power wires to pump sounds like pump is not activating, test fuel pressure while cranking if no pressure fix pump curcuit good luck (MORE)
What could be wrong if a 1997 Toyota Tacoma ran out of gas and then would only run for a few seconds so you replaced the fuel filter but now will only start with starting fluid?
Answer vapor lock . You've vapor locked the fuel system. You need to find and open your bleed screws and get all of the air out of the fuel lines.
Why won't your 1996 Chevy truck 5.0 fuel injected start even though you are getting fuel up to the throttle body it will run if you put fuel into the throttle body until it burns it out?
Answer . Possibly inadequate fuel pressure. I forget the Minimum acceptable pressure, but that's easy enough to have checked.. It has to have no less then 9 LBS. And no more then 13 LBS. to start and run. You need to take the fuel line loose on the tank side of the filter and install a press…ure gauge in the line and cycle the key on and off, That will tell you the fuel pressure. 9 - 13 PSI. is the spec's. (MORE)
1998 Pontiac Sunfire It starts and runs great and will run till you turn it off then it wont start again for a couple days I changed the fuel filter that wasn't it?
To get started ...... . \nGosh, this is another question that doesn't quite give us enough information.\nI'm guessing that even though the car won't start sometimes, that it DOES\nturn over. In other words, it's not a battery/starter problem?\nIs your check engine light on, or has it been on rece…ntly? This sure sounds like a fuel system problem\nto me, and I think you're on the right track since you replaced the fuel filter. I wonder if it might\nbe a fuel pump problem? (MORE)
My 1993sable won't start has new fuel pump and new fuel 1ilter new fuel pressure regulator and no pressure on the fuel rail but it will start if you use starting fluid and run fine all day long?
try changing the fuel pressure regulator which is located on the front fuel rail. when you put the new one in make sure you put some lubricant on the o ring to keep from damaging it. . Make sure the vacuum hose going to the fuel pressure regulator is good. The vacuum hoses wear/collapse and break …- they can start acting up with just a leak and intermittent problem, but ultimately break all the way => no-start. (MORE)
1991 Audi 80 5cyl has fuel delivery problem pump appears to work gas comes out of filter car tries to start very briefly catches then dies will run on constant starter fluid?
Answer . car has mechanical fuel injection, so a dirty jet or jet setting is very unlikely. check the rubber boot that runs to the intake plenum for cracks. may also be a fuel distributor issue, or dirty injectors.. maybe a dirty jet or carby also check that the fuel pump still goes while moter …starts get someone to listern for the tapping of pump or feel it vibrate if you can find it and if carbereter wind mixture screw all the way in and then turn screw 2 and a half full turns (MORE)
93 Subaru Legacy 2.2 MFI have fuel on eng side of fuel filter can start and maintain idle with starting fluid but will not stay running no fuel any suggestions?
Answer . First check fuel pressure with a gauge and make sure it is within specs. needs to have sufficient pressure to push fuel through injectors. Air cleaner neck must also be installed for vehicle to get proper mass air flow meter signal to ecm.(all hoses to air cleaner neck must also be ho…oked up). Check your vitals first (fuel pressure) (MORE)
Your 1997 crown Victoria wont start when gas is sprayed into intake it runs briefly you just put a new fuel pump and fuel filter into it also Its apearently not getting gas?
\n. \n Answer \n. \nYou need to check for fuel pressure in the fuel rail, check for proper operation of the fuel pump relay, and make sure the computer is detecting that the engine is running.\n. \n. \n. \n. \nOn many FORD cars they use a relay switch which is usually located on the drive…rs side, under the trunk mat. Reset or bypass to test this switch to insure that the fuel pump is getting electricity. That may be your entire problem. (MORE)
You just replaced the fuel pump in your 1989 gmc k1500 with a 5.7 tbi It get fuel up to the throttle body And it still wont start what else could be wrong?
Answer Is the injector actually jetting fuel into the throttle body? Ifnot the injector could be fouled. Make sure you have spark from the plugs. If not check the coil\distributor. if that doesnt work, make sure the vehicle is not backfiring because that is caused by a bad timing.. check your injec…tor a+b fuse, and check the wiring running to the injectors... (MORE)
98 ford explorer wont start I replaced the fuel filter and still no luck Battery is 12.8v Little to no fuel smell at the throttle body The fuel pump is on and fuel sprays from the hose near pump?
My explorer is 2004, so I'm not sure this will help but it's fuel reset button is on the passanger side under the glove box to the right.
What if your 92 grand prix will start but not stay running when the throttle is pressed Is this a fuel problem?
Answer . I have a 1995 Grand Prix, and it was doing that same thing. I checked all I could think of , Wires Plugs, Vaccum Leaks, PVC Valve, Fuel Filter, and at last I checked Battery Volts and it was weak to say the least,so I knew the Battery was old so I put in a new one,and that was it. Car ha…s been running great ever since, You would think the Alternator would make the car run good once you started it , but I guess it needs a good Battery as well. Hope this helps. Augie (MORE)
Have to spray starting fluid in the throttle body to start 1985 gmc jimmy S-15 any suggestions It is a v6 and has new fuel pump?
Answer . easiest and safest way to spray starter fluid is to spray it straight into air cleaner. you will not need to remove anything to do this and the engine will suk the fluid thru you really need to have the throttle body looked at ,as starter fluid is primarily for use in a diesel,not a g…as engine (MORE)
1992 Eclipse changed starter alt fuel filter battery in a couple days while driving it will start to chug and then die wont turn over like the battery is dead jumpstart it runs for bit then dies why?
your alternator is gone, u need a new one. i know because if it runs for a bit then dies that means the alternator isn't charging the battery
1990 town 5.0 engine fuel problem I have replaced fuel pump filter no fuel being delivered to engine. I squirt fuel into throttle body. Engine tries to start. Have fuel pressure a sh radder valve.?
You should open your trunk, on the driver side hinge theres a small black box attached, on the top of the box theirs a red button, this is the fuel pump reset all you have to do is press it down ...and your done !@
Why would a 1988 Chevy silverado die on road replaced fuel pump and still no start but it runs with starting fluid thens dies with out the starting fluid?
Check fuel injectors at the harness plug at the injector, with key ON, engine off. There will be 2 wires at the injector plug, 1 while using a ohm and volt meter, and 1 wire should have battery voltage with key on at all times, the other wire use a test light and back probe while someone else is cra…nking the motor the test light should blink on and off, while cranking. If the test light in not blinking during the cranking you most likely need an ECM Module. Your fuel injectors gets there ground pulse from the ECM so if you have fuel pressure, ignition, and spark and 12 volts at the injector but no ground replace the ECM.. Hope this helps!! (MORE)
87 Jeep Cherokee-inline 6 4.0Lt and it will not stay running. It will start with starting fluid dies soon as the fluid is burned up. replaced Fuel tank pump assembly filter near rear axle..more....?
continued...replaced - air filter, battery, distributor cap & rotor button, sparkplugs & wires. Cleaned the carbon build-up in the throttle-body intake. After adding either (starting fluid) to the air-intake the jeep will start and run rough for a second or two and then die, may re-start once or tw…ice more but will not stay running. I figured changing the fuel system would fix issue but it did not...any help or even questions and then help would be awesome! (MORE)
Replaced fuel pump and filter why won't it keep running after starting Bridged the relay it runs put in a new relay it wont keep running Why?
Did you check the inertia fuel switch on the floor under th glove compartment maybe it is open.
Truck will be running fine then all of the sudden it will die and wont start for a while but if you wait for a minute or so it will start and run fine is this problem the fuel filter or somthing else?
Sounds like a plugged catalitic converter. When they heat up they block air from getting by and the engine will not run.
Chevy blazer s-10 wont start its getting gas it has a new fuel pump and fuel filter but there is a low spark also the engine turnsover a few times but just wont start what is wrong?
i had something like this happen - and it was the ignition control module located in the distributor
What can I do next on 93 Buick Regal replaced fuel pump still won't start runs with starting fluid can here pump come on but wont pump fuel?
Just because you hear the pump come on doesn't mean it's pumping. Or that the fuel line is hooked up just the way it needs to be. You'll need to pull the pump again and check it to be sure it works.. Don't rule out an inline electric fuel pump somewhere between the tank and engine. It got my Chev. …truck running again with very little hassle. (MORE)
Your 87 Camry 4cyl wont start it runs with starting fluid sprayed in it you just replaced the fuel filter it has gas in it it acts like the fuel inertia switch is open but you cant find the switch?
Make sure the fuel pump is functioning properly. A faulty fuel pump is far more common than the switch. If the fuel pump is receiving voltage but does not build pressure, you have a faulty fuel pump. Often a failing fuel pump will cause the fuel pump fuse to fail. People tend to want to blame the co…mputer or computer controls for problems when there is usually a more simple cause of the problem. (MORE)
Why does a 1976 Jeep require starting fluid to start when it's cold but not after it's run for a while when the fuel pump is relatively new and it gets plenty of fuel while driving?
Check the fuel filter and be sure it isn't stopped up. Next, try to move the carburetor side to side. They are known for loosening up at the base to bowl section. If all of that is okay then check the automatic choke.
Your 1997 suburban is not getting fuel you checked the fuel pump and it shoots fuel out the fuel filter you put a new fuel filter on the truck the truck will start with starting fluid please help?
You need to have the fuel pressure tested. The pump may seem to be working but not the required pressure needed.
2000 rodeo will not start died while driving. thought i ran out of fuel. changed fuel filter also fuel pump but still wont start. just cranks but no fire.?
Try checking the oil packs for spark.Happened to me on my trooper.The second time it happened it was a broken wire to the fuel injection.I also replaced the gas filter to no avail.Hope this helps.. I accidentally typed in oil packs.It should be coil packs for spark. also check for any broken wire…s to the fuelo injection.The same thing happened to me twice on a trooper. (MORE)
I have a 1996 Chevrolet 1500 I replaced the fuel pump and the filter still will not start if I dump gas in the throttle body it will fire but will not run what is my next step Thanks?
Possibly something wrong with CSFI ( central sequential fuel injection)system. Or maybe wrong fuel pump installed. If fuel system is TBI (looks like a carb.) then maybe aproblem with fuel pressure regulator. You could also have an electrical issue, check for power at the the fuel pump. Uses a fuse a…nd a relay ( both under hood) (MORE)
What could be problem on 1990 GMC 5.7 engine with throttle body Pour fuel in and engine will start and run at high RPM. Lower RPM it dies. Checked compressiongood. Checked vacuum leaksokay?
I would look into the throttle position sensor first, make sure it's adjusted correctly. Next thing to look into is the engine coolant temperature sensor. It is connected by 2 wires 1 black 1 yellow at the front of the intake manifold. That being broken, or malfunctioning could cause it to tell the …ECU that the engine is always running cold causing it to run excessively rich, dumping in way too much fuel. The other thing I can think of to check on is your fuel pressure regulator, if it's not metering properly you are again running way too rich causing the vehicle to stall out. It basically sounds to me like the vehicle is getting too much fuel, and not enough air since when you hold the throttle open it remains running at higher RPMs when it's taking in a much higher volume of air. (MORE)
Why won't 1996 sierra six cylinder start even after fuel pump has been changed but when you pour gas in the throttle body it will start until that runs out?
you should check your fuel pump fuse and relay and if that isn't the problem, make sure you are getting power to the fuel pump if all is good it may be possible that you have purchased a bad pump. you can also remove the pump from the tank and hook it directly to a battery to check power.
when you changed the filter did you prime the fuel system ? this is usually done on the top of where the filter screws on !
It is like electricity. Devices we use need it for power. It's the same concept, the car needs fuel to run, it's like its power source.
You have 45 to 50 lbs fuel pressure at the release valve have spark voltage and 96 blazer still wont start you can dump fuel into throttle body and it starts and runs til fuel runs out Fuel pump or re?
First off,Your fuel pressure is too low..... Specs are 55 - 61 psi. These vehicles will not start/run if pressure is even 1 psi below specs.... sounds like a fuel pump problem.also,these are known for corroded/faulty connectors at the fuel pump module and new pumps come with an updated wiring har…ness .. check also to see if you have injector pulse with a noid light. Check all fuses too.... You should hear the Fuel pump prime for 2 seconds then shut off when the key is first switched to on... (MORE)
1998 Chevy v8 vortex wont start until primed fuel pressure is 57 lbs fuel filter is new runs good what now?
Its still the pump. 4-6 lbs makes the difference. You might notice the difference at hiway speed and you hit passing gear. It wont respond as it should.. dont use a cheep pump or you will just do it over again.Or cheep pump and sell it..
Your 1993 s10 blazer wont start you were driving one day and it just died like it was out of gas you can still hear the fuel pump come on and you already changed the fuel filter but still wont start a?
check fuel pressure i think it should be 54-60psi if not high enouth its fuel pump
Diesel engines need to be primed when the have ran out of fuel. You should be able to find the primer either ontop of the fuel filter on near the inlet manifold
1999 Chevy Express 3500 does not start when cold no fuel getting to the plugs but if you put fuel down the throttle body it starts and will continue to run when the engine warm?
Check fuel pump and fuel filter. My 2000 Express 1500 with 5.7 had same symptom at 110K miles. Fuel Pump was weak. Be careful putting fuel or starting fluid in throttlebody, it can flame back out at you and may damage the honeycomb MAF and it's expensive.
What is min fuel pressure to start a 2001 silverado 1500 4.3 v6. my truck only shows 38 psi on a fuel pressure gauge... wont start. only if you pour fuel in the throttle body?
It should have 60 to 66 LBS. NO MORE AND NO LESS. are you will have problems. And yes that is why it won't start. Replace fuel pump.
Have 91 Toyota 4 Runner with V6 hard to start and only bearly runs for a few seconds with or without throttle pressed all the way down has new fuel pump filter plugs cap rotor?
Diagnosis: Engine Won't Start or Run WHEN AN ENGINE WON'T START Every engine requires four basic ingredients to start: sufficient cranking speed, good compression, adequate ignition voltage (with correct timing) and fuel (a relatively rich air/fuel mixture initially). So any time an engin…e fails to start, you can assume it lacks one of these four essential ingredients. But which one? To find you, you need to analyze the situation. If the engine won't crank, you are probably dealing with a starter or battery problem. Has the starter been acting up? (Unusual noises slow cranking, etc.). Is this the first time the engine has failed to crank or start, or has it happened before? Have the starter, battery or battery cables been replaced recently? Might be a defective part. Has the battery been running down? Might be a charging problem. Have there been any other electrical problems? The answers to these questions should shed some light on what might be causing the problem. If an engine cranks but refuses to start, it lacks ignition, fuel or compression. Was it running fine but quit suddenly? The most likely causes here would be a failed fuel pump, ignition module or broken overhead cam timing belt. Has the engine been getting progressively harder to start? If yes, consider the engine's maintenance and repair history. STARTING YOUR DIAGNOSIS What happens when you attempt to start the engine? If nothing happens when you turn the key, check the battery to determine its state of charge. Many starters won't do a thing unless there is at least 10 volts available from the battery. A low battery does not necessarily mean the battery is the problem, though. The battery may have been run down by prolonged cranking while trying to start the engine. Or, the battery's low state of charge may be the result of a charging system problem. Either way, the battery needs to be recharged and tested. If the battery is low, the next logical step might be to try starting the engine with another battery or a charger. If the engine cranks normally and roars to life, you can assume the problem was a dead battery, or a charging problem that allowed the battery to run down. If the battery accepts a charge and tests okay, checking the output of the charging system should help you identify any problems there. A charging system that is working properly should produce a charging voltage of somewhere around 14 volts at idle with the lights and accessories off. When the engine is first started, the charging voltage should rise quickly to about two volts above base battery voltage, then taper off, leveling out at the specified voltage. The exact charging voltage will vary according to the battery's state of charge, the load on the electrical system, and temperature. The lower the temperature, the higher the charging voltage. The higher the temperature, the lower the charging voltage. The charging range for a typical alternator might be 13.9 to 14.4 volts at 80 degrees F, but increase to 14.9 to 15.8 volts at subzero temperatures. If the charging system is not putting out the required voltage, is it the alternator or the regulator? Full fielding the alternator to bypass the regulator should tell you if it is working correctly. Or, take the alternator to a parts store and have it bench tested. If the charging voltage goes up when the regulator is bypassed, the problem is the regulator (or the engine computer in the case of computer-regulated systems). If there is no change in output voltage, the alternator is the culprit. Many times one or more diodes in the alternator rectifier assembly will have failed, causing a drop in the unit's output. The alternator will still produce current, but not enough to keep the battery fully charged. This type of failure will show up on an oscilloscope as one or more missing humps in the alternator waveform. Most charging system analyzers can detect this type of problem. ENGINE CRANKING PROBLEMS If the engine won't crank or cranks slowly when you attempt to start or jump start the engine (and the battery is fully charged), you can focus your attention on the starter circuit. A quick way to diagnose cranking problems is to switch on the headlights and watch what happens when you attempt to start the engine. If the headlights go out, a poor battery cable connection may be strangling the flow of amps. All battery cable connections should be checked and cleaned along with the engine-to-chassis ground straps. Measuring the voltage drop across connections is a good way to find excessive resistance. A voltmeter check of the cable connections should show no more than 0.1 volt drop at any point, and no more than 0.4 volts for the entire starter circuit. A higher voltage drop would indicate excessive resistance and a need for cleaning or tightening. Slow cranking can also be caused by undersized battery cables. Some cheap replacement cables have small gauge wire encased in thick insulation. The cables look the same size as the originals on the outside, but inside there is not enough wire to handle the amps. If the headlights continue to shine brightly when you attempt to start the engine and nothing happens (no cranking), voltage is not reaching the starter. The problem here is likely an open or misadjusted park/neutral safety switch, a bad ignition switch, or a faulty starter relay or solenoid. Fuses and fusible links should also be checked because overloads caused by continuous cranking or jump starting may have blown one of these protective devices. If the starter or solenoid clicks but nothing else happens when you attempt to start the engine, there may not be enough amps to spin the starter. Or the starter may be bad. A poor battery cable, solenoid or ground connection, or high resistance in the solenoid itself may be the problem. A voltage check at the solenoid will reveal if battery voltage is passing through the ignition switch circuit. If the solenoid or relay is receiving battery voltage but is not closing or passing enough amps from the battery to spin the starter motor, the solenoid ground may be bad or the contacts in the solenoid may be worn, pitted or corroded. If the starter cranks when the solenoid is bypassed, a new solenoid is needed, not a starter. Most engines need a cranking speed of 200 to 300 rpm to start, so if the starter is weak and can't crank the engine fast enough to build compression, the engine won't start. In some instances, a weak starter may crank the engine fast enough but prevent it from starting because it draws all the power from the battery and does not leave enough for the injectors or ignition system. If the lights dim and there is little or no cranking when you attempt to start the engine, the starter may be locked up, dragging or suffering from high internal resistance, worn brushes, shorts or opens in the windings or armature. A starter current draw test will tell you if the starter is pulling too many amps. A good starter will normally draw 60 to 150 amps with no load on it, and up to 200 amps or more while cranking the engine. The no load amp draw depends on the rating of the starter while the cranking amp draw depends on the displacement and compression of the engine. Always refer to the OEM specs for the exact amp values. Some "high torque" GM starters, for example, may have a no load draw of up to 250 amps. Toyota starters on four-cylinder engines typically draw 130 to 150 amps, and up to 175 amps on six-cylinder engines. An unusually high current draw and low free turning speed or cranking speed typically indicates a shorted armature, grounded armature or field coils, or excessive friction within the starter itself (dirty, worn or binding bearings or bushings, a bent armature shaft or contact between the armature and field coils). The magnets in permanent magnet starters can sometimes break or separate from the housing and drag against the armature. A starter that does not turn at all and draws a high current may have a ground in the terminal or field coils, or a frozen armature. On the other hand, the start may be fine but can't crank the engine because the engine is seized or hydrolocked. So before you condemn the starter, try turning the engine over by hand. Won't budge? Then the engine is probably locked up. A starter that won't spin at all and draws zero amps has an open field circuit, open armature coils, defective brushes or a defective solenoid. Low free turning speed combined with a low current draw indicates high internal resistance (bad connections, bad brushes, open field coils or armature windings). If the starter motor spins but fails to engage the flywheel, the cause may be a weak solenoid, defective starter drive or broken teeth on the flywheel. A starter drive that is on the verge of failure may engage briefly but then slip. Pull the starter and inspect the drive. It should turn freely in one direction but not in the other. A bad drive will turn freely in both directions or not at all. ENGINE CRANKS BUT WILL NOT START When the engine cranks normally but won't start, you need to check ignition, fuel and compression. Ignition is easy enough to check with a spark tester or by positioning a plug wire near a good ground. No spark? The most likely causes would be a failed ignition module, distributor pickup or crank position (CKP) sensors A tool such as an Ignition System Simulator can speed the diagnosis by quickly telling you if the ignition module and coil are capable of producing a spark with a simulated timing input signal. If the simulated signal generates a spark, the problem is a bad distributor pickup or crankshaft position sensor. No spark would point to a bad module or coil. Measuring ignition coil primary and secondary resistance can rule out that component as the culprit. Module problems as well as pickup problems are often caused by loose, broken or corroded wiring terminals and connectors. Older GM HEI ignition modules are notorious for this. If you are working on a distributorless ignition system with a Hall effect crankshaft position sensor, check the sensor's reference voltage (VRef) and ground. The sensor must have 5 volts or it will remain permanently off and not generate a crank signal (which should set a fault code). Measure VRef between the sensor power supply wire and ground (use the engine block for a ground, not the sensor ground circuit wire). Don't see 5 volts? Then check the sensor wiring harness for loose or corroded connectors. A poor ground connection will have the same effect on the sensor operation as a bad VRef supply. Measure the voltage drop between the sensor ground wire and the engine block. More than a 0.1 voltage drop indicates a bad ground connection. Check the sensor mounting and wiring harness. If a Hall effect crank sensor has power and ground, the next thing to check would be its output. With nothing in the sensor window, the sensor should be "on" and read 5 volts (VRef). Measure the sensor D.C. output voltage between the sensor signal output wire and ground (use the engine block again, not the ground wire). When the engine is cranked, the sensor output should drop to zero every time the shutter blade, notch, magnetic button or gear tooth passes through the sensor. No change in voltage would indicate a bad sensor that needs to be replaced. If the primary side of the ignition system seems to be producing a trigger signal for the coil but the voltage is not reaching the plugs, a visual inspection of the coil tower, distributor cap, rotor and plug wires should be made to identify any defects that might be preventing the spark from reaching its intended destination. ENGINE CRANKS AND HAS SPARK BUT WILL NOT START If you see a good hot spark when you crank the engine, but it won't start, check for fuel. The problem might be a bad fuel pump On an older engine with a carburetor, pump the throttle linkage and look for fuel squirting into the carburetor throat. No fuel? Possible causes include a bad mechanical fuel pump, stuck needle valve in the carburetor, a plugged fuel line or fuel filter. On newer vehicles with electronic fuel injection, connect a pressure gauge to the fuel rail to see if there is any pressure in the line. No pressure when the key is on? Check for a failed fuel pump, pump relay, fuse or wiring problem. On Fords, don't forget to check the inertia safety switch which is usually hidden in the trunk or under a rear kick panel. The switch shuts off the fuel pump in an accident. So if the switch has been tripped, resetting it should restore the flow of fuel to the engine. Lack of fuel can also be caused by obstructions in the fuel line or pickup sock inside the tank. And don't forget to check the fuel gauge. It is amazing how many no starts are caused by an empty fuel tank. There is also the possibility that the fuel in the tank may be heavily contaminated with water or overloaded with alcohol. If the tank was just filled, bad gas might be causing the problem. On EFI-equipped engines, fuel pressure in the line does not necessarily mean the fuel is being injected into the engine. Listen for clicking or buzzing that would indicate the injectors are working. No noise? Check for voltage and ground at the injectors. A defective ECM may not be driving the injectors, or the EFI power supply relay may have called it quits. Some EFI-systems rely on input from the camshaft position sensor to generate the injector pulses. Loss of this signal could prevent the system from functioning. Even if there is fuel and it is being delivered to the engine, a massive vacuum leak could be preventing the engine from starting. A large enough vacuum leak will lean out the air/fuel ratio to such an extent that the mixture won't ignite. An EGR valve that is stuck wide open, a disconnected PCV hose, loose vacuum hose for the power brake booster, or similar leak could be the culprit. Check all vacuum connections and listen for unusual sucking noises while cranking. ENGINE HAS FUEL AND SPARK BUT WILL NOT START An engine that has fuel and spark, no serious vacuum leaks and cranks normally should start. The problem is compression. If it is an overhead cam engine with a rubber timing belt, a broken timing belt would be the most likely cause especially if the engine has a lot of miles on it. Most OEMs recommend replacing the OHC timing belt every 60,000 miles for preventative maintenance, but many belts are never changed. Eventually they break, and when they do the engine stops dead in its tracks. And in engines that lack sufficient valve-to-piston clearance as many import engines and some domestic engines do, it also causes extensive damage (bent valves and valvetrain components & sometimes cracked pistons). Overhead cams can also bind and break if the head warps due to severe overheating, or the cam bearings are starved for lubrication. A cam seizure may occur during a subzero cold start if the oil in the crankcase is too thick and is slow to reach the cam (a good reason for using 5W-20 or 5W-30 for winter driving). High rpm cam failure can occur if the oil level is low or the oil is long overdue for a change. With high mileage pushrod engines, the timing chain may have broken or slipped. Either type of problem can be diagnosed by doing a compression check and/or removing a valve cover and watching for valve movement when the engine is cranked. A blown head gasket may prevent an engine from starting if the engine is a four cylinder with two dead cylinders. But most six or eight cylinder engines will sputter to life and run roughly even with a blown gasket. The gasket can, however, allow coolant to leak into the cylinder and hydrolock the engine. (MORE)
It may have wrong timing. May be, the electrical wiring are not fixed properly, e.g, they are opposite. There can be different reasons. i was chasing down a tail light problem and blue a fuse. i still have that problem? fusible link?
check for spark, compression and wiring It is possible that the filter was installed backwards check to see if the flow arrow on the filter is facing the right way.
You say the fuel pump works but does it pump the required pressure of 41 to 47 psi? You may want to have a pressure test done.
Wont start 1988 Chevrolet c1500 pu 305 cid throttle body fuel inj keeps flooding wont start installed new fuel pump fuel pressure reg fuel inject disb cap ingnition module still what else?
return line can be blocked fuel pressure regulator is leaking. I know you mention is new but check if it leaks when key is turned to ON................................... put the gas petal to the floor while starting it. that works for me.
99 vw cabrio trys to start on cold engine but takes many tries before it starts up I have new ignition coil fuel injector flush and fuel filter is this a throttle body issue or what?
There may be a compression problem here. Get a test done, this will check condition of rings and valves.
Why wont your s10 1996 4.3 not start have fuel pressure spark it will run if you spray carb cleaner spray down the throttle plate?
You may have fuel pressure but not enough. Have the fuel pressure tested with a gauge, it should read between 60 to 66 psi for the injectors to work. Also check the fuses to be sure none are blown.
Turn the key on,DO NOT try to start wait 3 seconds are until you hear the pump quite then turn the key off and wait 1 minute then turn key back on again until you hear the pump quit again. Repeat these steps about 4 times. Then start the engine. If you can't here the fuel pump running then the fuel …pump may have went out. (MORE)
Still won't start? Does that mean it didn't start before you replaced the filter? Obviously it wasn't the filter. Get back to basics. Test for spark and fuel. A filter is almost never the cause of a no-start.