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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-20-2002, 11:43 AM
Registered User
 
Join Date: Mar 2002
Location: Oklahoma, U.S.A.
Posts: 34
Intermittent Rough Operation

I would appreciate suggestions as to next diagnostic steps with which to pinpoint a problem I am having with intermittent rough engine operation on my 1983 240D with manual transmission (204K miles).

Most of the time it runs fine with its typical nice muffled diesel engine sound and smooth performance. However, about 15% of the time, it will idle and run rough and louder from initial starting and will continue that way, with poorer performance, throughout the entire time the engine is operating until it is shut down. I have observed that a change of state, i.el from good to bad or the reverse, never occurs during the time the engine is operating and also that once the condition occurs during a start and operation, it is likely to exhibit the same condition during subsequent starts and operations during that day. The next days initial start is most likely OK (~85%). I have verified that the intake manifold butterfly valve is operating smoothly and is not sticking closed or open. All of the mechanical throttle/injector linkage seems to be operating freely. Does the intermittent occurrrence and the nature of the problem suggest a vacuum issue -- pump, valve, lines, etc.?

Thanks

__________________
Okiebenz
Reply With Quote
  #2  
Old 05-20-2002, 12:08 PM
mccan
Guest
 
Posts: n/a
First change fuel filters. Sounds like a possible fuel flow prob. Start with filters and work back to tank (lines, tank screen).
Reply With Quote
  #3  
Old 05-20-2002, 02:07 PM
Registered User
 
Join Date: Mar 2002
Location: Oklahoma, U.S.A.
Posts: 34
Thanks for the response. I changed both the fuel filter and pre-filter recently and I have not noticed any lack of flow at the pre-filter. I am fairly new to this forum and I believe I may have posted the original message to the wrong area. I will also post it in the Tech Help area.
__________________
Okiebenz
Reply With Quote
  #4  
Old 05-20-2002, 02:12 PM
mccan
Guest
 
Posts: n/a
Have you tried massive dumps of Redline or Stanadyne or some such in the fuel tank? Algae or other gunk in the fuel system could be the prob. Consider diagnosing the tank to filters before moving into the Injection Pump.

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 11:37 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