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Posted by abdul (90 GXE 92 SE 5spd) on August 13, 2002 at 19:40:01:
In Reply to: About the IAC-AAC.... posted by James on August 13, 2002 at 17:53:58:
Remove valve unit and check plunger for Seizing or Sticking.. Check the IACV-FICD solenoid Valve..It is a violet connector close beside the IACV valve. Check it by applying 12v voltage to it..if it clicks..it is fine...remove it and check to see if the plunger is sticking. Check for broken spring. The last thing to check would be for the IAA unit itself. According to my FSM..it recommended removing it and testing it in hot or cold water and check airflow to see if it metered according to temperature. My personal recommendation would be to buy 2 gaskets from Nissan.. One for throttle body where it mates to the manifold and the other for the IAA valve where it mates to the throttle body. I did this last month..Removed the whole unit..did a thorough cleaning and set the base idle. The car idles @750 like a clockwork orange after this.. I'm scannerless currently...otherwise I'd scan it in for you. Abdul
Check resistance of IACV-AAC valve resistance by unplugging the brown connector..look by the power valve..it should be there..hard to reach..of course. Check resistance using an ohm meter..it should be approximately 10 Ohms.