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HondaDustR HondaDustR is offline
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Join Date: Jan 2007
Posts: 2,439
Try unplugging the O2 sensor. The DME will run in open loop mode without it (interestingly enough, the way it was designed for...the O2 system is a crude system tacked on to meet EPA regs, and causes the DME to do weird things if the sensor is defective).

Disable the idle stabilizer and see if the base idle speed is way off, causing the ICV to oscillate trying to correct too much difference.
Idle Speed Adjustment
I've heard the adjustment screw is prone to loosening up as the seal dries up with age. Have you cleaned the throttle body? The idle screw bypass port can get gunked up.

Does the car run fine otherwise?
1987 silver 924S made it to 225k mi! Sent to the big garage in the sky

Last edited by HondaDustR; 11-12-2012 at 11:27 AM..
Old 11-12-2012, 11:25 AM
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