Hi CD, thanks, removed the ALDA, no change still 5 psi.

Hitman, good suggestion, I was worried about possible backpressure in the exhaust, my cat is in the middle section of the car, big oval looking thing, is that the one you are talking about? If so I'll see if I can remove it although it seems welded to the pipe and I may have to hack it off.

__________________
Stable Mates:
1987 300TD 310K mi (Hans)
2008 Jeep Grand Cherokee OM642 165k mi (Benzrokee)