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code 35

Posted: Thu May 03, 2007 10:01 pm
by rob
i keep gettin a code 35 so i changed my IAC and reseted the battery and it came back,the IAC i bought is a brand new from GM.what else causes code 35 to come up?its weird cause when the engine light comes on the fan comes on too and then the fan goes off the engine light goes off too...my idle is 1500rpm right now when its warm..the car is a 91 gtz with quad 4

code 35

Posted: Fri May 04, 2007 3:50 am
by Jeff P
According to the manual, Code 35 sets when:

* Engine speed is at least 175 rpm more or less than "desired."
* TPS voltage indicates throttle is open less than 1%.
* VSS indicates vehicle speed is less than 3 mph.
* All above conditions are continuously met for 5 seconds or more.
* IAC steps must be less than 10.

Code 35 can also be caused by a vacuum leak (cracked/broken/disconnected vacuum lines), improper sealing of manifold or throttle body gaskets, cracked intake manifold or throttle body, misadjusted idle stop screw, bad IAC valve (obviously), or damaged wires/bad electrical connection to IAC valve.  Hope that helps.