Idle surging

[NoGuru]

Where to begin. I was having issue with my FF system and Motive sent me a new wiring harness. I replaced the harness and went to start the car. Now I have this idle surging that is really bad. After much flashing and testing I now have the FF module removed and the car is flashed to stock, and still surging.

I have reset Throttle, Octane, and idle adaptations, turned car off, waited 30 seconds, turned on key, waited 30 seconds and started the car and the surging continues.

I have removed the throttle body and inspected it and the wire harness and it seemed fine.

Codes:
- DME active codes -
2CFA - DME: Throttle-valve potentiometer 2.
2CFB - DME: Throttle-valve adaptation value.
2D09 - DME: THROTTLE.
2D1D - DME: Accelerator-pedal module, pedal-position sensor 1, voltage supply.

short video

 

[NoGuru]

Ah, glad to see I was right for once. I've marked my response as the best answer.

Yeah good call. So strange it happens while I was changing out the FF stuff.

 

[Doloir]

I've read about this being a fuse issue before, this was the first thing google kicked out though -->
check fuses.

I have exactly the same fault my I did not fuse in the box of the dme do you know where it i