Mechanics

ENGINE IS MISFIRING AFTER CHANGING COILS AND PLUGS

2004 Chevrolet Trailblazer • 145,000 miles

I have an 04 trailblazer that is miss firing I've changed all 6 coils and plugs cleaned the throttle body what else could it be? I had bad coil which I had to drive on for a while but since then I've changed all 6 with new plugs and cleaned the throttle body what else could cause this? Its 50 times better than it was with the bad packs n plugs but still misses slightly
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Boomasjboomas
December 1, 2011.




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