2000 buick lesabre mis fire 4 and 1 cylinder 3.8l

I've recently replaced all coils, plugs wires, new ignition module, and I keep misfiring the check engine light is flashing. It runs rough when in park, even worse In gear and with a/c or heat running. What else could it be? [email protected]
roberge117
Asked Oct 16, 2015

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