Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-05-2014, 05:32 PM
Wayne at Pelican Parts
Guest
 
Posts: n/a
Mercedes-Benz W124 Project: EGR Change Over Valve Replacement

Anyone got any questions on the Project: EGR Change Over Valve Replacement for your Mercedes-Benz W124?

Here's a back link to the original article: Pelican Technical Article: EGR Change Over Valve Replacement

-Wayne

Reply With Quote
  #2  
Old 08-22-2014, 01:10 AM
jake12tech's Avatar
Registered User
 
Join Date: Nov 2011
Location: Philadelphia, PA
Posts: 2,770
Quote:
Originally Posted by SFMerc1993 View Post
Hi Wayne

I'm chasing down an intermittent high idle problem on a 1993 300E. I want to determine whether the EGR change over valve may be responsible.

Symptoms:
- Intermittent high idle (1000rpm in D, occasionally suring 1000 - 1500 rpm in P)
- High idle coincides with loss of CC
- High idle appears triggered by cold start, usually disappears on warm re-start
- High idle reappears midway through long (80 mile) journey, removed again on re-start when engine left off for several minutes
- Error code 5 & 6 showing (LED blink box)

Work done so far:
- Engine wire harness replaced
- Throttle body replaced (used late model, wires in good condition)
- New MAF, IAT, OVP. Oxygen sensor 12k old
- EGR valve cleaned and appears to work (cannot blow through)
- Clogged EGR pipe replaced with new, rubber version (about 30k ago)
- Head gasket replaced 40k ago

Other
- At 'good' idle, the revs are constant-ish (700 plus of minus 30rpms - usually a drop followed by bounce back
- Car otherwise drives beautifully with good power, kick-down etc
- Removing vacuum line/oil filler cap causes revs to drop
- The vacuum line into the EGR from the ETA is sometimes a constant suck, sometimes a pulsating suck. It doesn't seem to correlate with the high idle

The appearance of the high idle with the cold start and then engine at normal running (as well as code 5) leads me to believe something is wrong with the EGR system. I need the car to pass smog, so a few more goes before I hand over to the pros.

Any advice appreciated. Thanks! --Tom
Delete this post and start your own thread.

Reply With Quote
Reply

Bookmarks

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 04:30 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page