5.9L Cummins (2003-2007.5)
my buddies 04.5 cummins threw a p0642 code and they think its the ecm that is causing it, running on 3 cylinders. my question, can i take my ecm off my 04.5 and put it on his to see if it fixes his problem? If so do you just hook it up and go or is there a procedure or something? any help would...