Ok, I just finished putting my car back together last night, after 2 weeks filled with me not knowing what to do, to remove all emissions. As stated in title, car is an S4 NA.

Removed/lines ran were:
-Removed ACV, blocked off, RTV on all flat spots and around outside
-Ran new fuel lines, from filter to primary, primary to secondary, secondary to return nipple on firewall
-Removed EGR, blocked off, RTV on all flat spots
-OMP line ran to side of Dynamic Chamber
-Fresh air bleed line for primary injectors ran to back of Dynamic Chamber
-BAC line ran to back of Dynamic Chamber
-BAC's coolant lines eliminated, RTV'd and capped off at the block + water pump housing
-FPR line ran to side of Dynamic Chamber
-Pressure Sensor ran to nipple on UIM right above ACV
-All spare nipples capped off
-Throttle Body completely modded, no cruise, no thermowax, no secondary throttle plates, etc.


So..anybody know what my problem could be? Or how to fix it? :\ My car currently idles at 3000 RPM all the time, and with no exhaust except for stock manifold and 1 precat, this is VERY ANNOYING.

 

hmmm, I would venture to guess it may have somehting to do with the TB mod, given that the mod really does nothing for an N/A it may have affected the airflow at lide, but I really don't know...

Has the idle set screw's position been upset during all the emmissions removal & throttle body modification?

edit: im leaning away from a vac leak since you say it IDLES at 3000 not hunts for idle at 3000, or hunts period....

 

Few things I forgot to list..

The line on top of the charchol canister, not the one that goes to the gas tank, is venting to a small catchcan.

The line coming off the oil filler neck is also venting.

 

Yeah it just plain idles at 3000.

When I disconnect the throttle cable, it idles at 2200..

 

i did all that to my n/a recently. mine runs great. better throttle response. mine idled real high untill i reset my idle and tps. thats all you have to do. removing that stuff messes with that. so all you have to do is reset it.

 

Check where you removed the thermowax on the throttle body for the idle cam. I had this same problem. I forgot to remove it. Wish I had a pic of it to help you out. Go back and just check everything on the throttle body. And also try turning the "hard set" idle screw also on the TB.

 

Ted saves the day!





how it should look on the TB

 

The bleed for the fuel injectors sounds all wrong. Why didn't you leave it at the front where it was originally?

This could be easy to figure out. Just remove all the hose at the nipples on the throttle body/dynamic chamber and cap them off and see if the idle changes.

OMP should go to the FRONT of the throttle body. Saying SIDE is difficult to imagine.

 

I did remove the fast idle cam, as I said, I fully modded the throttle body.

And HAILERS, Everywhere I read said the primary bleed goes on the back? I guess I'll swap it to the front..

And yeah, I'll try the shutting off all nipples thing tomorrow. Thanks everyone, and more information is welcome :X

 

On a turboii it goes on the back to any of the nipples except the bottom one.

A non turbo is different. I don't look at mine much, but I'd bet money it's on the front. One of the three nipples one above the other. ONE of those is VACUUM and you DO NOT want the bleed air going to a source of VACUUM. If you do the idle will be *funny*.

 

AH! That could be a major problem! Currently I "might" have the bleed air for the injectors to vacuum, and the FPR on fresh air vent! I'll check it all out tomorrow!

 

About the FPR vacuum source. It should go to the side of the dynamic chamber. By side I mean the left hand side of the dynamic chamber. There is a nipple there. On a normal car theres a vacuum hose coming off that nipple and going to a solenoid. Then from the solenoid to the FPR.

By side I don't mean front or rear of the dynamic chamber. And I'm talking series four, not series five.

And the OMP line should not go to the left side. It should go to the front of the dynamic chamber/throttle body. It goes to the largest nipple there. That nipple does not pull vacuum. Good.

 

Yeah, the OMP is on the front. By "front" I considered the TB side the front. Apparently that's not quite right <.< Yeah, I'm gonna go hook up the stuff as you said.