ok here is goes i don't know if this has anything to do with it but i have an obx intake manifold and latley i have had some problems with it and got it fixed and just recived my a/f gauge and hooked it up and it wondered from lean to rich and the just stayed at rich. the car wont idle below 1200 for some reason. which is a rough idle. the aren't any air leaks. what could be the problem. help

did you tap the hole for the iat?

you mean the sensor on the intake manifold right?

white smoke and rough idle, immediately I wanna think headgasket... when my headgasket went, white smoke was coming out the tailpipe that smelled a lot like coolant...

ok what is this iat it hooks up on the intake manifold right. i think this might be the one that is not hooked up on my car

correct it hooks to the intake mani in the back, but i dont think it would cause white smoke id have to go with the other guy on the head gasket although no iat i would think would affect your idle a little, computer would run engine rich all the time im guessing

Originally posted by jcold83
i have an obx intake manifold

I am gonna take a shoot at this just cuz I have the venom manifold which is pretty much the same thing...

First off, I bet you could tell all the holes on the back of the manifold are not drilled/tapped correctly. You should have fixed those first. Then you need to drill a hole on the side of it for your MAP sensor, and you need to probably weld in a bung or something for your PCV Valve. Next, you either have to weld in another bung and extend the EGR pipe or just get rid of the whole EGR system period and use block off plates. Then in the back, you should have your vac lines as well. You need your IAT for sure.

Did you do all this already?

Also, check for vac leaks too cuz my VENOM manifold, the flange on it was not straight, it was warped just a little bit.