Gtr Idle Issues

[adamelliott]

Hey guys I'm new to this site. I own a 94 r32 gtr and I have some issues with the idle. It constantly idles at about 1300rpm, when cold and when at NOT.

I've taken the aac valve off and cleaned it real good with the throttle body cleaner and found the internal spring was sticky. After cleaning the aac, the spring moves nice and easy. Reinstalled the aac with a new gasket and adjusted the screw but it couldnt go in any further and idle was still no different.

I then installed an apexi power fc and adjusted f/c idle down to 1050 and it started to hunt.

It's as if the automatic choke (if rb26's have them) is stuck on all the time..

[BuuBox]

A common problem is a small air leak on the inlet manifold.

A pain to replace the gasket on, and if your car has been tuned with the leak, you'll have to get it re-tuned.

[blind_elk]

There are any number of threads that deal with this problem.

First, have you ever had the throttle bodies cleaned around the butterflies? If so, bad luck, you have introduced an air leak that is next to impossible to eliminate.

The TPS might not be sending the "throttle closed" signal to the ECU. This problem might also be evident during (upward) gear changes where the engine will tend to hold revs during the shift.

To set the idle with the AAC, you need to disconnect the TPS before making adjustments toi the AAC screw.