Yes, heat increases resistance. Mine went bad at home, as I was topping off my radiator. I pulled it off and tested it, (still warm) and found two of the "circuits" to be bad. Next morning I tested it, and it was within spec. So I threw it back on the car, but it still wouldn't start. I know Advance auto parts tests them - they heat 'em up, too.
With a '94-'95, the TFI isn't on the dizzy, it was moved to some cooler location. Make sure your spark plug wires are good, because arcing causes premature TFI failure, I think. I've also heard of pickup modules (and
crankshaft position sensors) malfunctioning in this way.
If the problem persists, you should check your fuel pressure too.
Sooner Derek said:
So, if this module is bad it only malfunctions when the engine is hot?