Jerry Stoneking
Junior Member
- Joined
- Oct 30, 2020
- Posts
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I have a 2008 GT that ran great. I replaced 1 coil pack (#1 cylinder) with an Accel SuperCoil for a test fit. I drove about a block and the car starting running terrible. I came right back home and put the old coil back on, but the car still idles like crap. My OBDII tool says mis-fire on all cylinders. What happened?