90lumina3.1 Posted November 4, 2002 Report Share Posted November 4, 2002 ok... my car's been idling rough lately, and its been much worse after the oil change, but that doesnt seem to have caused it... i left my car idle for a few mins to pick up the trashcans, and when i went back into it, the SES light was on... i decided to run the codes, and i got the idle speed control circuit (code 35). is that the same thing as my idle air control? if not, then what is it? other question i have is about the pcv valve. i bought a new one, and cant seem to find the old one. i looked it up in the chilton's manual, and it shows a setup almost like mine, except the breather hose is diff. it seems as if everything on my car is different then everyone elses. the car is a 90 chevy lumina euro 3.1 v6. help would be greatly appreciated. Quote Link to comment Share on other sites More sharing options...
stlunatics2oo3 Posted November 5, 2002 Report Share Posted November 5, 2002 your pvc is like way in teh behind on the engine like sort of under teh plenum just look back there you will find it Quote Link to comment Share on other sites More sharing options...
eclipse5302 Posted November 5, 2002 Report Share Posted November 5, 2002 The code 35 (idle speed error) is the IAC valve. It's the cylinder like thing with a 4 pin plug on the throttle body. It's attached with two Torx T-20 screws. Pull it out, and clean the inside of the housing with brake cleaner (don't drench it, just clean it). Then install the new valve, after coating the o-ring with oil. I just worked on a Z34 that had a miss at idle, no off idle power, and it idled at 2k when cold. It also failed emissions. I changed the IAC valve, and the thing spun the tires from a stop, didn't miss and pass emissions geat. Jason Quote Link to comment Share on other sites More sharing options...
90lumina3.1 Posted November 5, 2002 Author Report Share Posted November 5, 2002 how much is a new valve? Quote Link to comment Share on other sites More sharing options...
eclipse5302 Posted November 5, 2002 Report Share Posted November 5, 2002 I don't know, $30 or so? Go to like AutoZone, or CarQuest and get one. Jason Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted November 5, 2002 Report Share Posted November 5, 2002 Yeah, around $15 - $30 depending on where you get it. Quote Link to comment Share on other sites More sharing options...
90lumina3.1 Posted November 6, 2002 Author Report Share Posted November 6, 2002 the exit pipe to the cat glows bright red... its blocked, i need a new cat! Quote Link to comment Share on other sites More sharing options...
eclipse5302 Posted November 6, 2002 Report Share Posted November 6, 2002 If you know how to weld, changing that is easy. Jason Quote Link to comment Share on other sites More sharing options...
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