[W126 Coupe] HIGH IDLE

[Jim]

Bellamy
   Thanks for that info,  there is just one unit there- 8'' by 4'' with a plug in cable. It is numbered  0 265 101 006 also has a part number Bosch 3497959. Just under the windscreen centre left ? That reminds me- the problem started the day after I water hosed
the windscreen for the first time ever!!! I thought that large unit was the major control unit for the cars computors and was told that the idle control unit is a black box 4 by 3 '' Could it be somewhere else?
   James
Down Under
  ----- Original Message ----- 
  From: Mister McGoo 
  To: mbcoupes at mbcoupes.com 
  Sent: Tuesday, June 21, 2005 1:08 AM
  Subject: RE: [W126 Coupe] HIGH IDLE


  Jim;

  Re: your high idle problem... the symptoms sound exactly like the idle control module taking a crap.  But this need some clarification..........

  The Idle Control Module is NOT in the fuse box.  The Fuel Pump Relay is in the fuse box ("001 545 53 05 - 5500/min 8 Zyl Kickdown" etc... or similar.... could be 5300/min iun yours).  

  The Idle Control Module is normally (is there a "normal"???) on the firewall in front of the wipers (could be a 002 545 33 32 depending on your Euro specs) and it is fastened with screws to the firewall with a removable cable socket plug.

  I suspect that your Idle Control Valve is operating OK.

  -Bellamy 






  >From: "Jim" <snow at snowy.net.au>
  >Reply-To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>
  >To: "mbcoupes" <mbcoupes at mbcoupes.com>
  >Subject: [W126 Coupe] HIGH IDLE
  >Date: Mon, 20 Jun 2005 21:50:27 +1000
  >
  >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
  >The MB Coupes Website!
  >W126 SEC Mailing List
  >Postings remain property of MB Coupes, L.L.C.



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