I had a nasty boost leak before and turned out it was the crossover pipe. I fixed that and did a non seq conversion. After all that was done it boosted to about 11psi great (+.70 on PFC)! After a couple of weeks it now has gone down to 9psi (about +.60 on PFC) and its hard to get it up to that +.60. It averages +.54. I have checked all of the pipes past the y pipe. Doesnt seem like anything except thair is air seeping between the throttle body and the intake elbow. Would that cause a 2psi loss? I have looked at the on website that shows all possibilities of boost leaks and didn't really get much. But oh well. Can someone tell me something else to look at.

 

What about a clogged cat?

 

I replaced that when i did the conversion as well.

 

Try disconnecting the airpump, and pugging the holes with 3/4" hose caps....

I had an issue where I got inconsistant boost and it would start buking due to air leaking past the airpump...

It's unlikely that this is it, but worth a shot, and would only cost you 4$-5$

-DC

 

I disconnected the airpump but didnt cap of the tubing but that wasn't it either.