It's either the A/F mixture (running too rich), idle air control valve, and/or the PCV valve.

After coming to a stop, the RPM drops to 300 RPM, lights dim, and it's like the car is about to shut off. Same thing when I pop it in neutral, rev it real quick; it drops to 300 RPM, the entire car shakes, lights dim, and goes back up.

So I took apart the TB (or at least attempted to) tonight to clean the IACV and locate the PCV valve and replace if necessary. Why in the name of Russian Czar do we have TWO throttle bodies? I've taken off the engine cover before but never realized it. The throttle cable and the cruise cable are connected to the second (sequentially) TB, as is the MAP sensor and the IACV. The first one... I have no idea; just a coolant line and 2 other lines I have not been able to find out yet.

Since we had to do my buddy's coilovers, I put it on hold and put everything back together, but man... am I going to have fun when I work on it. This is crap.



Any ideas on what could be causing the problem? I just ordered a V-AFC II to tune the a/f ratio, and I'm going to try to clean out the IACV early next week.

 

why are you even messing w/ it?

i would just take it to the dealer.

 

same thing was happening to my 2002...went to teh dealer..They put on a new Throttle Body and its BETTER than new!!!

 

The first one is the VSA throttle. The second one is the actual throttle body.

I agree though, just take it to the dealer.

 

I just had to put another bottle of fuel injector cleaner in (was idling rough again). Could this be the same issue (car idles low after start or at a traffic light)? The symptoms improved after an oil change but are still there.

By the way what is the cost of replacing the throttle body?

Thanks!

 

Ah. That makes sense. Thanks a lot for the info.

 

Do you guys think the dealership would fix it under warranty with the mods on my car??

 

It is worth a try.

 

I'm so sick of the OBX headers, I might take them off. They are producing a metal tinging noise all across the RPM band in no consistent pattern, and the idle/vibration problem surfaced right after I installed the headers.

 

rob, take it to suburban..

i'll talk to ya at the meet tommorw