Thread: Reverse Rough After header installation

I'm getting alot of vibrations in the wheel and in the car but only in reverse im not sure it its cause the engine is tilting and pressing the headers into my fire wall causing more vibration or if it's a more serious problem I should be worried about no codes being throw about it only receiving an egr deletion code

likely the o2 sensor hitting the firewall.

will it eventually bash its own hole and stop or am I gonna have to rip her down again

wanted to know if a 1psi flux in my vacuum was about right im reading -6.8-8 while idling pcm is still in relearn process

Dude, you should be idling at close to 20...There should be little to no relearn really needed. And there should be no effect on vacuum unless you messed something up.

Check for leaks. If anything you will want a bung welded in on the j pipe or on the crossover

you should be at, at least -19-20 for your vac.

if only at 6-8 you have a huge vacuum leak.

What manifold gaskets did you use?

I'm hoping you cleaned up the stockers and reused them and not the new **** ones they give you.

Or if you deleted the egr then I would check the block off at the lim and rear header.

LIM egr block off plate is suspect #1

Originally Posted by Beelzeboul

wanted to know if a 1psi flux in my vacuum was about right im reading -6.8-8 while idling pcm is still in relearn process

This has to be a typo. Your motor would be trying to jump out of it's mounts if this were the case. (If you could keep it running) As 99 said, no learn needed for vacuum.

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.

Those gaskets are already leaking. Take em off

Like a real boost gauge or on your scanner?

after checking my LTFT I was given 16.4 which lead me to believe vaccum leak also coupled with the fact that my coolant light has been coming on intermittently I'm thinking my TB gasket gonna check it tommorow but thats my lead culprit the exhaust is unrestricted but I do have to replace the Bandclamp on the DP as a 3inch seemed a little to lose so I'll just plan on swapping gaskets out than. I knew the Gaskets were reusable didnt see a point with fresh new ones but I should have expected the company that sends cheap ass uclamps would cheap out on the gaskets as well. its with scanner dsm

made a new thread topic

http://www.grandprixforums.net/vaccu...tml#post864997

have yet to figure out how to edit thread titles

Lol, I have the same deal going on with my SD headers. I am not too worried about it, it seems to only happen in reverse, so oh well.