Hi, guys. I've got a problem that's got me stumped, and if anyone can shed some light on it I would be grateful. My 2001 S80 T6 112000 miles, just passed Cal. smog and shows no codes. At any steady speed it acts like the key is being turned on and off rapidly-just sort of stutters along. Under light acceleration it hesitates and surges. Under heavy acceleratation it will leap forward, go dead, surge forward again, hesitate, surge again. I replaced the MAF with no change. I am at a loss as to what the cause could be or where to look- no codes, passed smog with flying colors, starts and idles perfectly. Has anyone else encountered this? Anybody have any thoughts or answers? BTW- I had an 850R that acted up very similarly and the MAF was the culprit that time. Please help!!! Thanks t