Mack Posted December 2, 2010 Share Posted December 2, 2010 SO, I have a 1989 mitsubishi montero with the 3.0L 6g72 runs and drives just great except that it misses on one cylinder. when its cold, it has very weak spark on cyl #2, and when it warms up, there is no spark on #2. All the others will throw an inch long spark, but #2 nothing. From what it looks like, it appears to be a similar set up to a Z31 ECU. chopper wheel in the dist, feeding a signal to the ECU which controls the coil for advance and dwell. And thats why its so odd that is has weak spark only on #2. Its a single coil. Ive tried different wires, dist caps and rotors, and it always craps out on #2. any ideas? I have already tried a used ECU and it acts the same. Quote Link to comment Share on other sites More sharing options...
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