Reving up at shutdown

J

jandaso

New member
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.
 
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My truck just started doing this after installing my injectors, dual cp3 kit, and fish controller. I sort of figured it was a glitch in the cp3 controller. But now I wonder what else it could be.
 
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