Thanks for the respond paedbo.

Idle is fine, when the engine is cold the idle is a bit high but not much ( the truck does not move), so when the engine reach correct temp I have a really good idle. The engine dosen't just rev up it revs up like crazy, like over reeving the engine with no load at all. I haven't reach that kind of rpm when i'm driving at full throttle. I have a futaba 3PM and I haven't had any glitching with it before so I don't think so.

I can try to describe it again.
let say you pinch the fuel line the engine starts to rev up and will die, but here it's keeps on reeving up it's like some thing is leaning out the fuel or something. but it only happens when i loose power to the drive line
I have a very wild guess here.
The air filter gets allot of snow on it and the snow melts to ice and the engine gets no air because it's allot of ice in the way. But if it's not getting any air it would rater lower the rpm instead of raise the rpm.
No it can be it.

I'm open for suggestions

Thanks for all help paedbo. If you or anybody else has a suggestion please feel free to give me a replay.