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
Old 01-08-2003, 08:15 AM
Super Moderator
Join Date: Apr 2000
Location: Falls Church, VA
Posts: 5,316
Wayward Woman Thanks Steve B and Cap'n

I have been trying to fix a surging idle and what I thought was a rich idle mixture on my 380SL (the Wayward Woman), believing that either my lambda controller or the frequency valve was at fault because of the duty cycle reading I was getting and because I could not hear or feel the valve vibrate.

It turns out that a new oxygen sensor stabilized the idle. AND, following the Steve B - Cap'n dialog, I was able to determine by measuring the sensor's voltage that the idle mix is actually a bit on the lean side - .27 volts from the sensor. So (I think) the frequency valve is going to be silent since it is staying closed trying to richen the mix.

Why exactly I am getting a lean reading now, when it failed it's emissions test earlier is unclear, but I suspect that I fixed a vacuum leak as part of the head and timing chain replacement that has been done since the test was done.

Details are on the Vintage Forum.

Anyway, thanks to Steve and Cap'n for the great diagnostic information. Hope Cap'n gets his problem solved as well.

Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
Reply With Quote
Old 01-08-2003, 08:23 AM
Registered User
Join Date: Aug 2001
Location: secret
Posts: 3,044
That is the real purpose of this forum, where we can learn from others with similar situations!! Glad it helped you and I appreciate your wish for help on my problem, I need it!!

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 04:36 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, 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