[W126 Coupe] Idle Air Motor???

[jralex at ix.netcom.com]

Alexander, Do a search from mbcoupes.com/wi26/search for air slide valve. Some have removed and cleaned with sucess. Others need to chime in, Jono?

-----Original Message-----

>From: Alexander Hochhausl <plustech at optonline.net>

>Sent: Feb 20, 2008 5:45 PM

>To: 'Mercedes Coupes Mailing Lists' <mbcoupes at mbcoupes.com>

>Subject: [W126 Coupe]  Idle Air Motor???

>

>OK Gents I have a new mystery. Yesterday I got in the car and noticed it

>idled a bit rough when it was cold. Once warm, better, but still a bit

>rough, and have an intermittent (random) miss, like a sputter, every

>5-10 seconds - when stopped in drive. I notice my vacuum is a little

>lower than normal. After stopping in drive after driving, the vacuum is

>low, then creeps slowly to almost normal in a few seconds. 

>

>I checked for vacuum leaks, but found none - throttle closes fully. I

>suspect maybe the idle air motor (valve) is being temperamental? Can

>this be opened up and cleaned? Any other things I am overlooking? I

>doubt it's ignition related as it is not a 'regular' miss. 

>

>One other symptom I have always had is that on occasion, when starting

>the car at neither cold nor 'normal' operating temperature - the idle

>'lopes' between 500-800 RPM, every 3 seconds or so in neutral for a

>minute or two, and then settles down to normal idle. But if I put it in

>drive, it holds steady at 600 RPM.

>

>.... oh do I miss the days of carburetors .....

>

>Thanks All, 

>

>Alexander Hochhausl, PE

>Tel: 516-909-3794

>'89 SEC 560

>

>The MB Coupes Website!

>W126 SEC Mailing List

>Postings remain property of MB Coupes, L.L.C.