[bighaas79]

Just a thought, when you cleaned the maf sensor did you pull it apart, so you could see the side that would normally be covered by the screen? Only reason I ask is i just happened to do a 99 today that the side you could see looked perfect but the side toward the screen and the air filter was absolutely filthy. I make it a habit to take them as far apart as i can to make sure they get totally clean, and it just happened to make me think of yours. Almost identical symptoms. Only way i caught it was at idle the trims were say -8% to -10%, right at the very limit i like to see them, and when you would bring the rpm up it would flop to +8% to +10%. Went right to the maf after that and sure nuff that was it. ran like a top after a good cleaning. Not sayin this is it but like i said before it still sounds like air/fuel control to me. It could be an egr problem, can you do a egr test with the program you have? Usually they will set a code but it wouldn't hurt to check it.