mdm6713 Posted November 21, 2006 Share Posted November 21, 2006 Ok been dealing with this car, now when you start the car(cold) the engine wants to rev up and down...like a yoyo. Eventually after about a minute it settles down and idles normally, a little high, then gradually comes down as it should. I think I may be dealing with a faulty IACV Idle air control valve any ideas? BTW this is a California model, and the IAVC is a little bit bigger than most GS's and there a Thick(maybe 1/2") tube that runs into it housing, at the top of it. When you unplug the tube, there a lot of vacuum from the tube end...which runs into what looks the fuel rail. If you hook the hose up too fast the car will stall out. Theres no check engine light anymore. Driving it runs great. thanks for everybodys help in all my troubles Quote Link to comment Share on other sites More sharing options...
fonzo91121 Posted July 3, 2009 Share Posted July 3, 2009 Hey, I have a 93 gs also but, my idle sits at about 500rpm and stays there. could this be the IACV? One day it just started acting up. Quote Link to comment Share on other sites More sharing options...
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