Where is the IAC at?
Thread Starter
Super Member
Joined: Jul 2005
Posts: 831
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From: Denver,CO USA
"88 300CE- First Year Production
Where is the IAC at?
Guys where is the idle air control valve at? My ride has a bad idle and if I sometimes don't give it a litlle gas it just shuts-off, is that all I need to inspect and clean along with the lines near it?
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The idle control valve helps stabilize rpms, but it won't cause a rough idle unless the rpm's are so low that it is on the verge of stalling all the time. It is located in front of the distributor and is a black barrel cylinder shaped item. If you have a rough idle look at the idle air hoses first. They become brittle/rock hard over time. Check for vacuum leaks all over with some carb cleaner.
Is this all the time or variable?
Is this all the time or variable?
Last edited by ps2cho; Mar 22, 2009 at 01:19 AM.
Thread Starter
Super Member
Joined: Jul 2005
Posts: 831
Likes: 1
From: Denver,CO USA
"88 300CE- First Year Production
Well sometime when I'm just idling or at a stop the rpm's surge up and down at times but mostly like to where its rough and wants to die, but when it gets high in rpms its gotten up to 2000 rpm on its own. I don't even know where it suppose to idle at anymore, I just give it a lil gas everytime I stop or slow down now to make sure its still running.
MBWorld Fanatic!
Joined: Apr 2007
Posts: 2,381
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Ok if its idling up towards 2000rpm then the ICV could be suspect. Pull it off and shoot some carb cleaner all over it and make sure it looks okay. The rough idle could be all the idle air hoses if they have never been replaced.
