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Old 09-18-2005, 08:39 PM
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Malibu engine question

Trying to help my buddy get his 2000 model year Chevy Malibu running.
It has the 3.1L v6 engine and has around 100k miles.

The car ran just fine before he put an aftermarket stereo in it. He wired the red (hot) wire off the stereo to some wire out of the dash that was not a hot wire.

The car starts up and revs fine, but shuts itself off in about two seconds.

All the fuses are fine and we have since re-installed the factory stereo and it also works fine.

I am convinced that we are overlooking something very simple because the car starts up normally and the motor can be revved. The local Chevy dealer he took the car to says that all the computers are burnt up and quoted him $2000 for repair.

I have a hard time believing that the computers are the problem becaues the car runs fine for, well, less than five seconds.

Anyone else ever run into something like this? Is the problem related to GM's theftlock system? What should I start checking first? Should I cut a hole in the intake manifold with a torch and bolt a carb to it??

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Old 09-18-2005, 08:47 PM
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Don't know about the theftlock system, but it sounds like a possibility.

On the older cars, the starter when engaged also sent power to the ignition, while cranking. When the key was released, the power came from the ignition switch. Could this be a similar problem....it's getting power to start, but not afterwards.
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Old 09-19-2005, 01:36 AM
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You need to get a wiring diagram and figure out which wire your (not so smart) friend tapped into. If it did fry the computer you need to try to find one from the j/y. car-part.com would be a good place to look.
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Old 09-19-2005, 06:52 AM
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did you check the codes to see which ones were set when you wired it wrong.that should have been the first thing.
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Old 09-19-2005, 09:18 AM
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Sounds like your buddy got into the fuel pump circuit. The fuel pump relay will run the engine for about 2 seconds then drop out via its timer in the computer. The relay gets its power during startup-cranking, giving the fuel pump time to charge the system after the oil pressure sensor tells the computer its OK to turn on the pump. Check the fuse in your fuse block for the pump first-if its blown, clean up the wireing back to stock, replace the fuse and see where you're at then. If it still won't stay running, there is a fuel pump bypass jumper lead under the hood (green single wire connector) that you can test the pump circuit with. Remove the gas cap-apply ear-and listen for the pump to run while someone else jumps test lead to battery power. If the pump runs OK and the fuse is still good, you can then suspect the computer. Let us know what you find!!
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Old 09-19-2005, 03:24 PM
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Ill give that a shot tonight thanks for pointing me in any direction!
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