Cummis 6.7 is reving up at shutdown. any idea what it could it be. it started when I changed the rail for a T&C rail.
could it be the pressure relief valve ? It is a 31k. so not sure what could it be. I always had the truck plugged.
could it be the pressure relief valve ? It is a 31k. so not sure what could it be. I always had the truck plugged.
Last edited: