Quote Originally Posted by c5wagner View Post
Did you wire in the diagnostics port and a check engine light? Maybe that would give you a better idea of a bad sensor or some other issue.
I read that the 7427 doesn't flash codes like older computers so I have not bothered yet. My cable is ordered so I will be getting to that soon. I do try to avoid throwing parts at it without verifying that I have identified a problem. Since I got a free replacement for the ICM it made sense.