Dazed and Confused
Join Date: May 2012
Location: Upstate New York
Re: 2003 Ford Thunderbird Igntion System Problem
It was the PCM, the problem shouldn't have moved with the coil. I might be barking up the wrong tree, but I'm wondering if a leaking intake gasket could do this. I know it can cause a misfire, but depending on how they're actually measuring the coil performance, I can see this happening. Try this: Move swap the coil with another from the opposite side and check the plugs for fouling again. Not sure what's going on, but, so far, the symptoms aren't pointing to the PCM.
Ever notice that there's so many high performance parts available for GM products?
Did you ever think that maybe they NEED them?