Quote Originally Posted by Crazyguy03 View Post
So you have a MPS hub installed on the shaft. You're saying the MPS hub is slipping on the shaft? That's crazy....

Well I thought that earlier but it can't be enough to cause this much loss of boost. It does seem to have moved. But I'm actually talking about the end of the snout that drives the coupler. It's aluminum, the pins are steel, the shaft is steel.

the car runs perfectly when not under boost and since I installed the 04' PCM it does not go lean anymore and has not set anymore codes. When I first got the car and it had a 3.4" pulley on it I would get into boost and lay over lean pull timing and go into reduced engine power if I just went through 1st to 2nd gear. It now goes rich when I floor it so I do suspect that sOn my way! "Tuning" was done on the car that was pretty bad.