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buick gs regal misfire

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  1. DTC's, Problems & Troubleshooting
    Hi i was wondering if anyone has gone through this with the supercharged 3800 L67? I have a misfire in cylinder number four only when i accelerate hard, if I'm easy with the pedal i can sometimes get it to not misfire. i replaced plugs with the autolites and also just did the lower intake...
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