Thread: Reverse Rough After header installation

likely the o2 sensor hitting the firewall.

well maybe I have it wrong but looking at my boost it has it at -8 at idle I went over the egr blocker with a coat of jb weld It does seem like something was letting air out towards the back but after resealing that I couldnt feel any air in the vicinity of the back header I'm reading my afr at 14.7:1 commanded but the boost number does not really fluctuate unless im at idle. I did use the new gaskets wasn't aware they were **** I couldn't imagine them being completely useless though I hadn't read anything on not using the gasket provided would have done that up. like I said though I was judging my vacuum by the negative boost gauge which was reading about 8 consistently now.