Originally Posted by
LongFellow
Good point. The coupler is kinda big so that could be it. I wasnt sure if the was enough vacuum to allow that to happen and I havent got into boost yet to see if it pops out.
I guess I'll cut up some 2.5" tubing and stuff it in there for support and see if that fixes the issue.
The cold pipe should never be in vacuum. Ever. Vacuum only exists behind the throttle plate because that is a restriction. If you've got vacuum in the cold pipe, then you've got a restriction further up stream. Sounds like a big one, too. Leave a rag in the IC or hotpipe, maybe?