Quote:
Originally Posted by ragtopflat
copperhead, what did you do to disable your egr?
Found out from a couple of other drivers and a Cummins tech that, on a cold engine, if you turn the key on without starting, let it set for at least 10 seconds, this will close the EGR valve. After the ten seconds, then unplug the lower EGR wire. The EGR remains closed. This will throw a fault code, but no check engine light, no limp mode, etc. Truck runs smoother, less soot buildup around the stacks, and, in my case, a 1+ mpg increase. Others have seen about a 1 mpg increase as well, give or take.