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 10-05-2009, 01:20 PM
hron61's Avatar
Registered User
 
Join Date: Aug 2009
Location: lakewood,wa
Posts: 10
idle hunts only when cold

hi.
i have a 92 190e 2.3.
new problem started last week out of the blue. first thing when cold and only when cold the idle will hunt badly, it goes to about 1200 rpms down to almost dieing and back up and back down over and over untill after a few mins and once its warmed up it idles fine (not perfect but ok). after that it runs normal upon restarting. i cleaned icv, checked ovp fuse (no lights are on), cleaned throttle postion switch. been looking at past threads alot lately and cant quite figure that problem out. any guesses what i should try? thanks batman

Reply With Quote
  #2  
Old 10-05-2009, 02:07 PM
nick.ged's Avatar
Registered User
 
Join Date: Mar 2007
Posts: 393
clean your air intake temperature sensor, i know it sound crazy, but two guys on benz-world have reported weird cold idal problems (on 320's but exact same issues)that completely disappeared when they cleaned the intake temp sensor.
Reply With Quote
  #3  
Old 10-05-2009, 04:43 PM
hron61's Avatar
Registered User
 
Join Date: Aug 2009
Location: lakewood,wa
Posts: 10
forgot to mention that i tried that also. took it out and sprayed it with carb cleaner, no effect.
keep em coming. thanks
Reply With Quote
  #4  
Old 10-06-2009, 09:15 PM
hron61's Avatar
Registered User
 
Join Date: Aug 2009
Location: lakewood,wa
Posts: 10
update...

last night i was feeling it and opened up opv relay and reflowed all the solder joints, and while i was in the area i did the same to the fuel pump relay. i took out the temp sensor which is only about 25,000 miles old as is the 02 sensor. i replaced spark plugs which helped it run better after it was warm. still stalls when cold. any more ideas? thanks

Last edited by hron61; 10-06-2009 at 09:17 PM. Reason: added word
Reply With Quote
  #5  
Old 10-07-2009, 01:54 PM
Registered User
 
Join Date: Jun 1999
Location: Albuquerque, NM USA
Posts: 1,946
A cold engine requires a richer than normal mixture and a little extra throttle to compensate.

Components involved are
temp sensor
cold start injector
idle control valve

Vacuum leaks defeat the purpose.
__________________
Kent Christensen
Albuquerque
'07 GL320CDI, '06 SLK350
Reply With Quote
  #6  
Old 10-07-2009, 05:00 PM
Registered User
 
Join Date: Jul 2008
Posts: 1,236
Start spraying carb cleaner around, you'll find the vacuum leak.

__________________
-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition
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 05:37 PM.


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