1. The idle wanders about 50rpm...hunts up and down constantly. Idle is set at 750 rpm's. About 10% of the time, it will idle normal.
2. When letting off the throttle, i.e., side-stepping, the rpm's come down normally, but continue south to the point that the engine dies, or very close...it will stumble and then instantly shoot back up to idle. The higher the rpm's, the more the engine will go towards 0rpm's when letting off the throttle.
3. At higher rpm's, 2000 and up, it will miss, with the miss severity increasing with rpm's and throttle input/load. If I am hard on the throttle, it shakes the truck pretty good, if I am easy on it, I can definatley tell it's there, but not bad.
4. When I ease into the trottle, it will do nothing for the first bit of movement, and then "catch" and act natually. Kind of like it is binding, but every point of the throttle linkage works smoothly, and has no catches, snags, or points that bind.
There isn't any air getting into the system from the supply side, as I have ran clear tubing just before the lift pump verifying a nice, air free fuel feed.
Even though I bought another pump to swap on, this thing is driving me nuts.
Any suggestions
