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Old 06-13-2014, 08:40 PM   #7
Karnage219
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Re: 1997 Chevy Malibu misfire issue

Quote:
Originally Posted by Tech II View Post
OK, it doesn't misfire at idle?

It doesn't misfire under a light load? It only misfires under a heavy load?

New plugs were used? Properly gapped?

you installed new wires? And then replaced those? Sure you have the right wires going to the right plugs?

You replaced all 3 coils?

Were the coils new?
Sorry, i wasn't very clear, it only misfired under heavy load 2 weeks ago, now it is constant.

Misfires at idle

Brand new ACDelco professional platinum plugs gaped and checked at .060

New wires( one had a manufacturer defect so i replaced all wires again with a brand new set).

Right wires going to right plugs, carefully followed each wire from coil to plug nothing mixed up.

Installed 3 brand new coils, carefully and correctly re-attached wires, checked them for spark. all working properly.
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