Well if you have an Autozone in your area they can test it. I suspected mine as well (turned out to be both the TFI and the PIP sensor in the distributer) and they confirmed that it was out. This happened maybe 9 months ago, no problems since.
I thought Ford but the TFI modules on the fender wall on the sn95s so they won't burn up from heat on the distributors like the earlier designs did. I had mine tested at autozone twice and both times it came back OK. I was temped to buy the Wells unit but they insisted not to. The other thing I noticed is that the Ford unit is built better than the autzone unit to the eye, but I have installed a Standard brand TFI on an F250 and it looked closer to the stock unit construction.
Oh well, I guess I will play the get my stang stranded on the highway for now and see how long a stock unit will lasts.
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more!