I'm getting an occasional misfire on a 2013 Chevy Cruze with the 1.4L engine. Current mileage is 132,500. The coil pack was replaced at 82,600, and the plugs were replaced at 85,000. There are no codes, not even pending codes, but the "butt dyno" says I definitely have an occasional misfire that I notice under acceleration but only when the engine is cold. The engine also seems a bit sluggish when the AC is on. I bought the replacement boots with spring contacts from RockAuto, Standard Motor Products part number CPBK176 and am in the middle of replacing them. Looking down into the holes on the coil pack where the boots attach I see rough surfaces on on all four surfaces, but especially on the contacts for cylinders #2 and #3. I'll attach a picture. Is there any way to clean up these surfaces to help ensure clean electrical connections, or am I looking at replacing the coil pack?
Last edited by a moderator: