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Did you try correcting the ignition firing order, from the ignition coilpacks, leading to your spark plugs? Also Unless you have a PCM scanner, or has had your Buick scanned, & know for sure you are in fact having a misfire, I would look into your fuel system (fuel rail, fuel injectors, fuel pressure check.). You may have a clogged injector spraying at two or more of your cylinders, causing a misfire.... I hope this information could help you.

2010-01-29 14:29:52
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Q: What would cause a multiple or random missfire on a 1997 Buick Skylark you replaced everything electrical on it the only thing left is fuel system?
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