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 12-16-2001, 10:13 PM
Posts: n/a
Idle Fluctuation 300SE

I have a '89 300SE that has a slight hunt (idle fluctuation). I disconnected the three pin connection to the throttle valve and the resitance reading through the idle connection fluctuates slightly. I have replaced most all the vacuum lines including the inlet and outlet to the idle control valve (which I cleaned while removed), so I dont think I have any vacuum leaks.

I think the problem may be dirty/bad contacts in the idle contacts in the throttle valve switch. My question is, is it possible to disconnect the idle valve switch, and jumper the center and forward connectors simulating a good contact and see if the idle stabilizes, or would that damage the ECU?

While replacing the fuel filter, I checked the diaphram on the fuel accumulator and it is intact.

Reply With Quote
Old 12-17-2001, 07:58 PM
Registered User
Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
You can jump the wires to the ecu from the idle switch. Make sure that you are on the correct wire though. I would use an ETM.
Donnie Drummonds
Reply With Quote
Old 12-17-2001, 08:24 PM
Posts: n/a
Thanks, I'll give it a shot.
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
Mercedes (and BMW) straight sixes have a rough idle "by design"?! sanchezc Tech Help 32 12-22-2014 06:01 PM
1967 230s idle problem techrondon Vintage Mercedes 17 03-29-2004 10:25 AM
1989 300se rough idle at times SCOTTFISH Tech Help 1 11-19-2003 04:42 PM
W126 91 300SE rough idle revisited sixto Tech Help 0 02-20-2002 01:57 PM
380SEC idle problem confusing me-help please Michael Bushnell Tech Help 2 05-20-2000 09:18 PM

All times are GMT -4. The time now is 10:17 PM.

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