[W126 Coupe] HIGH IDLE

[Jim]

    Mike
 This morning I removed the idle air  valve slide  and flushed and cleaned
it. Gave it power and watched and listened to it operate. seems O.K.
Yes it has 4 ohms but no the screwdriver did not change  it. How can I check
it?
James
Down Under
----- Original Message -----
From: <mramay at att.biz>
To: <mbcoupes at mbcoupes.com>
Sent: Tuesday, June 21, 2005 7:39 AM
Subject: RE: [W126 Coupe] HIGH IDLE


> Jim,
> It could still be the idle air valve. Jim Baubel had a bad connection in
> the IAV and got the same problem intermittently. Put an ohmmeter on the
two
> pins on the IAV, it should read around 4 ohms, then smack it with a
> screwdriver handle and see if the connection opens (infinite ohms). If so,
> you have a broken wire internally and I can tell you how to fix it.
>
> Mike R.
> (702) 494-8056
>
> Original Message:
> -----------------
> From: Jim snow at snowy.net.au
> Date: Mon, 20 Jun 2005 21:50:27 +1000
> To: mbcoupes at mbcoupes.com
> Subject: [W126 Coupe] HIGH IDLE
>
>
> Hi all
>      Its a 84 500sec euro
> Problem
>           After normal warm up idle " 900rpm" the idle moves to 650rpm at
> 13 deg temp and is then normal for 10 minutes or ten hours , or whatever
it
> happenes to feel like that day.
>   Non  of the fixes in the Archives or the fix on the main board by Serge
> seem to match my problem..
>   Its either 650 or 1500 nothing between except during warm up When its
900
> With the  Idle Control Unit   REMOVED from the fuse box I can recreate the
> 1500 high by removing the 2 pin connector from the idle air valve. when
off
> its 1500 and 650 when pushed back on???   But!! if the idle is 1500 before
> i remove the plug its 1500 on or of?? With the OVR and fuse removed
nothing
> changes.
> Oh, forgot to mention . With the Control unit removed  I jump the pins
that
> power the fuel pump.
>   Strange, with the control unit removed It can be 650 or 1500 ?? does
that
> suggest its (control unit) ok?
> Have not removed the idle air valve. Is this straight foward or are there
> problems?
> Question
>         Engine is at normal idle (650) for ten minutes or hours. What
would
> then command it to rev at 1500. Even with the idle control unit removed??
> James
> Down Under
>
>
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