Hi all,

Just a curious question before I send my Power FC in for diagnostics. When putting back the stock ECU, would it hurt to leave the 4 wires disconnected?

(They are for EGR valve control, the EGR switch, AWS and the Split Air Bypass solenoid)

 

I'm curious too! Although I have a feeling this is something that has been answered before...

 

You can run stock ECU without those 4 wires, I didn't like how my car ran with my PFC so I drove to the dyno with the stock ECU, then swap it in the parking lot before the tune.

 

Does the stock ecu throw the CEL with them cut?

 

I didn't get a check engine light, but I believe if you try to read code from the ECU you'll get a few.