Curious, Did you ever find the problem, it sounds incredibly similar to what my 01 gtp just started doing-occaisional roving idle-from surging to 1500 and then almost stalling, bucking at light throttle-only occaisional as well, and No Codes. It sounds like a vaccuum leak to me, but He11 if I can find it!-Oh, and all only when Warm-Runs like a scalded cat when cool/cold. Not the cat, not the rear O2 (deleted to confirm). So far I've swapped out all the ignition parts (parts car, 00 gtp) for testing and no change .........Thanks for looking, Mike
