Quote:
Originally Posted by Jersthecool
I've always run 15 vacuum and never had a problem. Not too sure about the tps and what is the AAC? In my last post I refered to the IACV if that's what you're talking about.
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The IACV is NOT the primary idle control valve. The IACV is the long one that is held on by two bolts in the middle. Also the IACV is pretty much wide open inside and has little chance of clogging. The AAC valve is the primary idle control device. It is mounted on the base with the FICD valve and the idle screw. I have had great success in fixing idle problems by simply completely dis-assembling that valve assembly and cleaning the piss-shit out of it. Of course you then have to re-set the idle via the idle screw. The passages are very small and get clogged up with carbon. This can cause the valve to stick and all sorts of idle issues. THIS is the AAC valve assembly:
Nissan OEM S13 SR20DET Idle Air Control Valve AAC IACV
Just to be completely clear, the coolant guage has NOTHING to do AT ALL with the coolant temp that the computer sees. Those are two completely different circuits...