R
rtiqulatendisco
Guest
My truck has been cutting out and stalling at various speeds. Once the truck comes to a stop after spuddering and backfiring, it starts right up. The check engine light comes on a throws a code for the IAC/stepper motor and coolant thermistor. I have replaced both parts and they appear to be working fine. What else could be causing this problem? I have also replaced cap, wires, checked for cracked vacuum hoses, checked base idle and timing, and replaced coil pack.