chronicgs400 Posted July 11, 2008 Share Posted July 11, 2008 I have a 98 GS400 and the dealer told me I needed to replace the IAC valve and they quoted almost $600. I want to clean it myself and see if the code goes away and it idles better. I have searched and not been able to find a DIY on this or even a single pic of the IAC valve. I have read the DIY for a rx300 but does anyone out there have a pic of the sensor for the GS400? Maybe a factory diagram of how to R&R it would work to? Any info would be great. Thanks Quote Link to comment Share on other sites More sharing options...
GuyTelefunken Posted July 11, 2008 Share Posted July 11, 2008 IAC = Idle Air Control....There is no IAC valve on the 98 GS400. Idle speed is controlled by the angle of the throttle plate directly by the throttle actuator motor. I would recommend checking with the service manager to find out exactly what part they want to replace. Quote Link to comment Share on other sites More sharing options...
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