Ok, i put my Tahoe in OL and she runs fine, i put it in closed loop and she leans out by 3 +/- a bit AFR. The Trim is minimal, but Lean Lean Lean...
Also when i start up in the mornin, i have poppin noises then the RPM jumps to 1250...The rest of the day she is fine, no poppin no hesitation...
Any sugggestions?