I just had a problem come up with my 1990 F-150 302 where the engine will start when it's been sitting over night. If I drive it and let the engine warm up though, it will cut out or if I've stopped somewhere, it won't start. I tested the coil and it seems to be OK. All resistances are in line with spec. and voltage is getting to the coil 12.4V. I also tested resistance and voltage from the coil harness to the ICM harness and I think it's OK though the voltage from VTAC on the coil harness to Pin 2 on the ICM connector only reads 1.5 volts. Pins 3 and 4 both read 12.4 volts both on Run and Start switch positions. I'm suspectin the ICM though I haven't checked the PIP signal yet or taken the ICM off and tested it. Am I headed in the right direction or could there be something else going on. What's got me confused it the fact that it starts when it's cold and been sitting for a number of hours. Any help would be appreciated. Thanks.
Basil...