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Originally Posted by JustAGirl34
any way to check codes on a 91 lumina 3.1 ?
car wont start, has fuel but wont fire. coil pack and module changed. not sure where to go next.
any help appreciated.
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Use a piece of wire, or a jumper.
Take the car key, and put the car in the "on" position, but don't start it.
Use the wire, or jumper to short out the diagnostic plug... which is under the dash, on the right side. The two pins you have to short, are the top right, and the one immediately next to the top right.
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Those two.
a code 12, which is two one flash, pause, two flashes... indicates you have it in diagnostic mode. You will hear the cooling fans on your radiator kick on.
The service engine light will blink.
It'll flash once, pause, and then twice... to indicate "12" between 2 and 4 times, and then start spitting out other codes. Write down everything that comes out.
I have the correct diagnostic charts, but i'm at work so i can't post the codes. If you list your codes, i'll tell you what they are tonight.