Question about 1999 Pontiac Sunfire

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I was told fuel pump was out but can hear it run i put gas right into the throttle body stil will not start has fire on all cyl its the timeing right

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Here's the guide to the timing chain.The Ignition Timing

Computer operated - electronically controlled (refer to decal)

Posted on Dec 30, 2012

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Truck wont start after running out of gas put gas in 3 different times from gas can wont statt


Have you tried listening to see if you can hear the fuel pump run?

Try pounding on the bottom of the gas tank with the palm of your hand. Sometimes that can jar the fuel pump enough to get it to run.

You can also try putting a small amount of fuel in the throttle body and see if it starts. It won't run long but, if it starts, you know you have a fuel delivery problem.

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I have 1993 chevy 4.3 pickup that about every three years does the same thing it was the fuel pump relay located on passenger side of firewall under a plastic flap. I went to parts store told them my vehicle and got relay took 5 minutes runs fine again Semper Fi!

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1998 honda civic. car wouldn't start. thinking need gas. get gas. prime throttle body (maybe a little too much accidently) however, waited a day.(battery was dying from all the attempted starting. put an...


The only matter there should be in the throttle body is air. The throttle body in no way has anything other than "nothing" in it. The liquid you see could be the gasoline you threw into the throttle body.

Getting back to your problem. Do NOT have someone looking down the throttle body while you are trying to start the engine. That person may receive a haircut he will never forget! Get the battery charged. Try to start the engine because even though you think you put too much gas in the throttle body, it may start.

The tricky part. If the engine starts and runs for a few seconds, then you are having a problem with fuel delivery and that is the fuel pump most of the time but not always.. If it does not start at all, try one more time to pour gasoline into the throttle body, hold your foot about 1/2 way down on the pedal and then try again to start it. If it still doesn't start, it's time to check for spark.

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I have a 1992 camaro RS 305 with 5 speed. It will turn over but won't start, if you pour gas in throttle body it will fire right up and run like it should. I put in new fuel pump, new ECU, new TPS, still...


If you turn the key to the on position and you hear the fuel pump run, does it run for longer then 5 seconds? If so then you are going to need to look at your fuel filter, if it stays running then you are going to need to look at your fuel regulator. You can also go to Auto Zone and buy a fuel pressure test kit or rent one, and check your fuel pressure on the fuel rails. Check for spark also, if you are low on spark then you are not going to fire, unless you dump more fuel then you need to into the throttle body.

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The reason I'm checking the timing belt is that there is mis-fire in 1 & 2 cylinder. If the firing order is 1,2,3,4. I have continues fire out of 1 & 2, when plug wires are pulled out of head. 3...


unplug the fuel injectors, check the olhms on all. the readings should all be the same, around 11-11.5 olhms. Any readings that are higher is a sign of a bad injector which is what your problems sounds like., putting to much fuel to a cylinder causing different fuel amounts to each cylinder and causing it to backfire out of the throttle body , excess fuel . Also remove the throttle body and clean with cleaner and a toothbrush after replacing any injectors. Or there's a simpler answer and that the cambshaft is worn-out/round causing the lifters not to open enough to let in all the fuel. A worn belt would not cause misfires only on select cylinders but rather jump timing, slipping a notch on a gear and possibly bending a valve or valves and this cause a loud clacking or a really a sign to quit running the motor because it's broke! Good luck.

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I was driving and my van just died i had it towed home and had a mobil mechanic come look at it he took off plug wires and beat on the gas tank and it started right up he told us to replace the plugs and...


Humming may not mean pumping up to pressure. Has anyone put a fuel pressure gauge on it to confirm its up to spec? One thing you can try, is to remove air inlet hose from air cleaner where it attaches to the throttle body. With key off, open throttle up and give a good spray of WD-40 into the throttle body. Now try to start it. If it fires up briefly then stalls, then you have a fuel delivery problem, probably fuel pump, but try changing fuel filter first, in case it's plugged, causing low pressure at engine. If you have to change the pump, you'll want to change the filter as well anyway.

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have you tried replaceing plugs, wires, dist cap. if not then distributer. then timing chain

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Cranks but won't start fuel pump not coming on


put a small amount of fuel in the intake near the throttle plate then crank and see if it fires, if it does then it's a fuel problem, if it does not fire then pull a plug wire and put a philips head screw driver into the plug wire hold it 1/4 inch away from a good ground then have someone crank it over, you should see spark and it should be blue, if not then you have a ignition problem a bad coil or cam sensor but need to know what you found out on the two tests I told you first to give you a direction to go.

May 29, 2009 | 1992 Mazda 323

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