Originally Posted by
Bonanza35
Mine is the opposite of you're. Mine only does it in curse control.Like a little jerk back in forth. Not really noticable but I notice it. I thought it was the tuner, am I right, its a dptuner. Take it off curse control and its fine? Chet
My early 99 started to do this a couple weeks ago; only with the cruise control on. It happens when there isn't much of a load on the engine. It does this pulsating throttle thing. It doesn't change the speed of the truck, just an annoying pulsating thing (about a pulse every second). I think I'll be replacing the VSS. It doesn't do it driving with the pedal at the same speeds; I have no idea what else would be causing it. By the way, if I use the pedal to add throttle to the cruise momentarily, the pulsating disappears.
Bryan