Maxxforce, starting in cold weather? (High RPM's?)

I have driven four of these trucks and they all do it. It's a normal thing. If you let it go withut knocking the idle down, it will eventually go back down on its own.

 

its normal for maxxforces. i dont drive any of em cuz all of the ones i have seen do the same. our company is doing away with the maxxforces.(They suck)

 

Hows this for "they suck"............Mine blew up at 49995 miles. Put a hole in the block and everything. Throttle stuck wide open while it was warming up. Turned off the key and it kept running.................for about 10 more seconds, then BOOM!!!! I am getting it back next week. i know, what the hell am I thinking??????? It's still my truck. I must be getting old, change is just too darn hard.

 

sounds like you had a failed turbo and it ran off the oil passing thru the turbo

 

it is normal, it's part of fast warm up stategy in the programing, and it helps reduce aftertreatment problems. you would think they would let it idle a minute or two before reving them up but they are the engineers.