NewbieDavid

Ever since my truck was new, the cruise control causes the truck to jerk or chug when going down grades...towing or empty. Drives me nuts.

Anyone else seeing this too? Known fix for the problem?

auSS/Tin

Mine does this as well when going down hill, especially bad if I have the Quadzilla turn up to level 2 or 3. The throttle has to move so little to accelerate the truck cannot fine tune the throttle enough to keep a constant speed going. I have just learned to not use cruise when in rolling hills.

Good luck
Bill

ssandlin

Mine will do this too, but only occasionally, not on every down hill slope. Don't know why and have not seen a TSB for it either.

zuki_dan

My truck does this also, It only seems to do it on moderate hills with the cruise control set. I have observed the rail pressure fluctuating back and forth when it does it. It is almost like the truck doesn't know if it wants to slow down or speed up.
It is very annoying to me since I got the new trans, because there isn't much slop left in the trans now to absorb the fluctuations.

levigarrett76

mine does this as well...stock programming, with the diablo, smarty or smarty jr.

NewbieDavid

Thanks guys. Good to see I am not alone. Like you levigarrett76, I have tried disconnecting my Predator chip to see if that was the cause, but no, it wasn't.

Guess I will live with it until someone with some stroke finds a fix.

levigarrett76

my next move is to beat the hell out of the computer with a large stick

Runaround

Just lightly touch accelerater and it will stop not enough to accelerate just enough to stop it from jerking

levigarrett76

Mine doesn't do it with efi