high idle 99.5 truck

[tnfastbusa]

is it normal for a stock truck to idle up after a few minutes of run time and there is no 10.k mod on the truck i put a brand new icp and a cps on the truck when i got it took it to the dealer

[cchase]

yes it will idle up when its cold, it will also shut the EBPV to warm up faster

[tnfastbusa]

what is the ebpv

[cchase]

exhuast back pressure valve, it sounds like a wsshing noise that goes away when you get it gas. It holds hot air from going out the exhuast.

[tnfastbusa]

i also noticed that the truck sounds like it shuts off at 40mph when you slow down is that normal and it is a auto

[superduty4x4]

Originally Posted by tnfastbusa

i also noticed that the truck sounds like it shuts off at 40mph when you slow down is that normal and it is a auto

You mean that it just drop to idle, or the engine actually quits running? A Powerstroke is about 95% electronic and 5% mechanical. When you are crusing down the road and let off, there is a sensor on the go pedal called the IVS (idle validation switch) that will return the truck to idle. There is also a TPS on the go pedal that sends a signal to the PCM telling it how hard you're pushing the skinny pedal.