Parts Catalog Accessories Catalog Tech Info Tech Forums
  Search our site:    
 Cart  | Project List | Order Status | Help    

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 01-12-2002, 10:45 AM
Registered User
Join Date: Dec 2001
Location: Yorkshire England
Posts: 70
Question W124 Idle Surge

Hi folks

My E200 W124 '94 M111 engine is doing real odd things.

Starts Ok from cold, but after reversing out the garage, usually when I'm closing the door, the revs increase from 1000 to about 1500, for a second. The car is in Park so no problem.
It has done this for a month or so now.
Up to now, that was it. But it's doing it more often now, when I'm driving, and usually when I'm just waiting to pull out from a side road, and my foot is just resting on the brake!
when warm or hot, it's 100% OK.
I've checked the database, and looked at the OVP relay, and it is an early type, dated 93. Could it be that? Or any ideas?

Surrey England

94 W124 Wagon E200 103,000 miles
Reply With Quote
Old 01-12-2002, 11:11 AM
Registered User
Join Date: Dec 2001
Location: Yorkshire England
Posts: 70
OVP Update?

I just took a second look at the OVP on my car.

It's dated 93, but has the part number 201 540 32 45.
Any ideas what this is?
Is it a very old type?
I'm in England, but RHD cars would have the same OVP, wouldn't they?

W124 E200 Wagon 1994
Reply With Quote
Old 01-12-2002, 11:53 AM
Mark Stetson's Avatar
Registered User
Join Date: Jul 2001
Location: Los Angeles
Posts: 262
I can't answer your question directly, but I'm experiencing a similar problem with idle surge on our '93 300TE wagon (W124 chassis, 3.2L six). Do a search here for OVP, also for idle speed, idle surge or surging idle. There seem to be two culprits - the OVP relay and the idle speed control switch (valve? module?)
Mark Stetson
1995 E320 Wagon Moonstone Grey/Parchment 106K mi.
2007 E63 AMG Graphite/designo 75K mi
Reply With Quote
Old 01-12-2002, 01:50 PM
G-Benz's Avatar
Razorback Soccer Dad
Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
I have had this problem for over a year now, and I also have heard that the transmission "Reverse" and "Drive" switch (or sensor) can send bad codes and cause this effect...I will one day research this and find the absolute source of the problem.

In the meantime, I had replaced the OVP some time ago to cure a hot start problem, but the surging still rule out the OVP
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Idle surge and ten second start danieldono Tech Help 4 10-29-2004 04:48 AM
Return of idle problems - '91 190E 2.3 sbourg Tech Help 11 05-19-2003 10:25 AM
Idle surging on W124 under load (especially in reverse)... G-Benz Tech Help 5 11-19-2001 12:54 PM
W124 230E Idle surge Dinky Tech Help 1 10-07-2001 11:29 AM
lack of acceleration and surge @ idle speed George Tech Help 12 05-22-2000 11:08 AM

All times are GMT -4. The time now is 05:28 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page