My car dies intermitenly when it is warm which is a classic bad TFI module symptom. The strange thing is that it will start right up and run for a few minutes. You don't have to wait for it to cool off. I pulled codes and all I got was a 94,44 which are part of the smog delete and unrelated. Here is the funny thing. The original dizzy on the car has a black Wells TFI module. I just put a new motor in the car. I had a spare distributor that I used for the assembly of the new motor which I just left in it. This distributor has a grey Motorcraft TFI module. I remember Tmoss saying that interchanging the black and grey modules can cause driveability problems. Is that what is happening here?? Car is a 90 5-spd with a 93 Cobra X3Z EEC in it. 24 lb inj and Cobra MAF and TB. Which TFI module should I have in it?? Black or Grey????