[Deer Creek]

I had this happen to me when I replaced my ICP. Like Powerstroke said, its more than likely an exhaust leak at your Y pipe. Thats where mine was and that could also cause the running rough. I would start there because its FREE! Good luck!

 

[Deer Creek]

Do you have still have your CAT and Muffler on there?

 

[Deer Creek]

I was reading somewhere on here where someone was talking about low boost and the culperate was back pressure from his CAT. Just a thought.

 

[Deer Creek]

I wouldn't know man. I just read on one of the threads someone had low boost and it turned out it was his CAT. It got me thinking because mine has over 230K on it so it has to be time for a new one or straight pipe which is what I'm planning on doing. Just thought it might be something you could take a look at. Maybe one of the experts will chime in. . . . . . . . . .:bump: