Just curious on a question I have not been able to get answered. I have ordered AutoCal from PPEI (Kory Willis tune) and I currently have the exhaust light on and flashing and truck is in reduced power.

What I am wanting to know is can i flash my truck with the new Autocal that I will receive and will it get rid of this problem I am having? It will be writing over the ECM so I figured it should make it come out of limp mode. Is this correct or should I have dealership take of this problem before i upload EFI into the truck.


Thanks in advanced.