Had this happen to my 2011 prormk assult. My dealer couldnt find it, so I ripped it appart and found a wire going to the pto injector was grounding on the fuel rail. This was becouse the factory wireing harness was very tightly attached to the fuel rail, taped it up and away i went. Only problem though, becouse it ran lean on one cylender on and off the motor locked up. The dealer was able to fix that.
