 Idle-Up Valve, Or is it Air Bypass valve????? |
 Aug 12, 2009 - 9:00 PM
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 Enthusiast  Joined Jan 17, '08 From JB MDL, NJ Currently Offline Reputation: 30 (100%)  |
OK. So ive been having this massive problem with my car when Im running the AC. While im driving its fine (save the the noticable loss of power). When I come to a stop, the whole care shakes like a nanny on a baby. So i did some reading about my "Idle-Up Valve" (or air bypass valve as toyodiy calls it). Why not take it out and do some resistance readings accross the terminals, they turn out to be fine, but I noticed this adjustment screw. I turned it all the way to the left (pass side), and turned the car on, ploped it in drive then turned on the air. Well, idle dropped to 200-250 ish, car almost wanted to die, but the air was still going. Went out and adjusted all the way to the other direction (driver side) and all of a sudden whe nI run my air, my idle dosent drop like it used to (used to do about 100 or so at stops. I used to press the gas a bit just to keep from vibrating so much).
My question would be does anyone have any info about the adjustment screw on this thing? It was marked at the halfway point, but I think all the way and back a bit it runs soooooo much better. I just dont want to jack anything up down the line by having it adjusted "too far". Thanks |
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Replies
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Aug 12, 2009 - 10:56 PM
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 Enthusiast Joined Apr 18, '05 From Calgary Currently Offline Reputation: 20 (100%) |
how is your idle w/o the a/c running? it should be around 750 rpms when the engine is warm. turning the screw would alter your idle regardless if your a/c is running or not so it's not the best way to tackle the problem.
occasionally, i noticed with my car that when i stop while the a/c is running, the rpms would drop to about 250-500 and after about 4-5 seconds the idle up valve would kick in and raise the idle to about 900-1100 rpms.. so if yours isn't going up at all even after checking the wiring, it could be a vacuum problem or the valve itself. first check the hose between the idle up valve and the intake manifold/throttle body (whichever it's connected to). if it's ok, then try another idle up valve. This post has been edited by azian_advanced: Aug 12, 2009 - 10:57 PM -------------------- -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- |
Posts in this topic
Spider77 Idle-Up Valve Aug 12, 2009 - 9:00 PM
Spider77 My car idles fine right now. As far as the idle b... Aug 13, 2009 - 4:52 AM
Spider77 [quote name='Spider77' date='Aug 13, 2... Aug 13, 2009 - 5:38 AM Coligion My car used to struggle terribly while at idle and... Aug 13, 2009 - 3:32 PM Spider77 What your describing pretty much sounds like what ... Aug 13, 2009 - 6:13 PM Coligion I tried cleaning out my IAC first before replacing... Aug 13, 2009 - 8:35 PM Spider77 Thanks for the replys, but I got a question here. ... Aug 14, 2009 - 4:04 PM mikew04 Some auto parts stores sell lines in different siz... Aug 17, 2009 - 1:19 PM Spider77 You know, I never thought of that. I didnt know i... Aug 17, 2009 - 6:40 PM |
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