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  1. Seasonedveteran

    Advice on Ignition Coil Observation

    So I'm chasing down a rough idle without a CEL to go along with it. By that I mean you can feel it in the body of the truck, but the RPMs don't really dip, but you can witness the engine actually move, though. While doing my regular Spark plug interval (still running coppers, so 30k) I noticed...
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