my truck runs great but when it feels like it it will cut off light I turn the key off n back on
I have replaced the coil, pickup coil ,map sensor,ICM cap rotor wires. fuel pump relay. I'm at a loss.
I was going to replace the TPS see if that helps. anyone have any ideal what might be my problem.

 

my first move would be to inspect the ignition switch ... it is mounted on top of the steering column, under the dashboard. look for a split where the two halves of the case join together. if that looks good you can try adjusting the switch by loosening the mounting bolts and moving the switch upwards a fraction of an inch then retighten.