Was out early yesterday morning for a run. With temps in the upper 50's the truck has alot more jump but with a problem. Sometimes on a WOT 1-2 shift it stumbles for a half sec or so then goes. I was wondering if by some chance I am hitting the rev limiter?

It's not the blow off, that I know and you can hear it and when I looked at the tach it is a full needle width or better in the redline. I was surpised how diff the temps affect the truck. New sticky pavement results in twenty feet of rubber. I guess lower temps and cooler rubber don't make for ideal traction. Any thoughts on the stumble?

 

Either boost dump or torque converter lockup although the latter usually happens at 2-3 shift

 

Sounds like the dredded torque reduction between shifts....The computer actually stops firing 4 of the cylinders for that split second between the shifts to help protect the tranny....Most chip tuners will turn that off for you unless you request that they don't

 

Hey thanks, I forgot about the torque reduction. Kind of sucks.

 

Mine was "unloading" between shifts until I did the boost bypass mod. Now it holds steady and shifts like i have a v-body.

 

Thanks Grimace, but it is not the blow off "fart". The thing actually shuts down for a quarter sec or so, right after the "fart"