Question about 1999 Chevrolet Cavalier

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99 cavalier starts but wont run. I changed engine wiring harness off 2000. (Old harness is destroyed.) had to change conectors for injectors and fuse box is slitely different. there is an extra plug (big) next to the plug for fire wall. I prosume it for ABS. Car has not run for about 2 yrs. Sounds good when starts, runs about 3 seconds just wont stay running. Got any ideas?

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  • 45 Answers

I would suggest two things. First check to be sure fuel pump relay is staying on after starting. If vehicle has a security system, make sure it is not activated.

Posted on Sep 03, 2017

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Posted on Jan 02, 2017

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SOURCE: 1998 Cavalier No Spark in cylinders 1 & 4

ignition mod. grounds,pcm or timing belt could all be it but, I would have to look at timing first.

Posted on Jan 17, 2009

  • 61 Answers

SOURCE: Engine runs rough. Engine light on.

Try checking the spark plug, and the spark wires, if that doesnt clear things up then try replacing the roter under the distributor cap and check the cap for any corrosen

Posted on Mar 25, 2009

  • 3 Answers

SOURCE: change spark plugs did tune up on a 99 cavalier

I'm not a mechanic but you should probably change the coils....
it has 2 coils......just follow your spark plug wires the coils are at the end of them........cost around 60 bucks for 2

Posted on Jun 22, 2009

  • 69 Answers

SOURCE: 00 Cavalier won't stay running.

need to have it scanned to see what codes it has but sounds like a security system problem factory or add on if key has chip in it security prob very likely.hope i helped

Posted on Jul 06, 2009

  • 14036 Answers

SOURCE: Chevy 3500 Express truck. fuel problem?

IF YOU GOT CYLINDER MISFIRE.OR OPEN FUEL INJECTOR.THAT WILL CAUSE THE PCM TO ENRICHEN FUEL MIXTURE.TO ADJUST TO DEAD CYLINDER.WHICH ACT AS A LARGE VACUUM LEAK.THATS WHY YOUR EXHAUST TAIL PIPES HAS A RAW FUEL SMELL AND WHITE SMOKES.

Posted on Sep 03, 2009

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Cavalier '99 the fuel pump fuse blow only if the car is in drive and press the break pedal or pull the hand break, if I run the car on drive is OK if I do not put the brakes. On reverse and park i


Thats wild.
The fuel pump - injector circuit is on one fuse and the brake circuit is on a different fuse. I can't think of a way the two would be connected other than something wrong with the fuse box.
If the pump fuse blew when you hit the brake pedal, it could be something shorted in the harness, but that would not explain the parking brake.
If there is nothing wrong with the terminals in the fuse box, and no sign of trouble with the wiring around the brake pedal, you may have to hunt the wiring harness back to the pump to look for bare wires.
It might be easier to run a new wire from the pump relay to the pump outside of the main harness.
They make circuit breakers that can take the place of regular fuses, but that would only be a temp fix.

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Are you getting voltage and pulse to the injectors ?
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