I have a surging problem that Ford has not been able to diagnose much less fix. When we are driving the truck using the throttle, it surges, maybe 50-100 RPM but it does not do this surging issue when we are using the cruise control. The surge is not a lot, just enough to be really irritating especially driving across the desert in the middle of no-where. The throttle control part number is “699-203 53154 13147 China”. We have the”fixed diesel accelerator peddle.’ How do we disconnect the plug? Thank you!