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

 
 
LinkBack Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old 03-28-2002, 07:57 PM
Moderator
 
Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,538
Help! Idle problem mechanic can't diagnose. Very technical info...

Mechanic replaced the water pump on my 93 300E (3.2 liter M104), and now my idle fluctuates up and down at idle, when the transmission is in any gear, and only when the engine is completely warmed up to operating temperature.

My independent MB mechanic (own shop for 19 years) has gone over everything he knows to go over.

He has a Baum CS2000 scanner, and it gave him codes for the coolant temperature sensor and the mass air sensor.

I ordered both parts from Fastlane, and neither solved the problem.

He hooked up the scanner again and then got a fault code 31, which means: fuel adaptation (lambda) control, mixture too lean (rich stop), (intake air leak, fuel injectors, fuel diaphragm pressure regulator).

He checked and there is no intake manifold air leak. He replaced the fuel diaphragm pressure regulator. Didn't help.

The weird thing is the check engine light never comes on, even though it should.

He's going to sleep on it, and try one more time tomorrow. If not, I guess I'll take it to the dealer.

Any help - Benzmac, M.B.DOC, Stevebfl?
__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
Reply With Quote
 

Bookmarks


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


Similar Threads
Thread Thread Starter Forum Replies Last Post
380SL Idle Problem Kevin_300CE Tech Help 4 08-02-2007 05:50 PM
Weird idle problem involving Overvoltage Protection Relay Earnest Tech Help 7 06-16-2005 11:01 PM
1993 300E 3.2 idle problem gsl56 Tech Help 15 11-11-2004 01:22 PM
Like everyone else...idle problem david74mr Tech Help 20 07-17-2002 08:49 AM
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 10:27 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page