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
  #16  
Old 09-19-2010, 03:25 PM
86560SEL's Avatar
Registered User
 
Join Date: Jan 2003
Location: east Tennessee (southeast USA)
Posts: 3,015
Quote:
Originally Posted by mbzman View Post
I have a uneven idle that I've been trying to figure out. You can hear and feel the engine surge while idling. I did install a new set of Bosch HR9DC plugs and Beru wires last year to no effect. Can resistor plugs make that much of a difference?
Not sure if its your problem or not, but when my moms 300SEL did this (when it was my car) it turned out to be the voltage regulator, but we also had "flickering" lights.

Now I am in the market for new plugs for her car... non-resistor plugs are hard to find... thats whats in there now, I didnt know, but one local MB mechanic said they were not good for the M103 engine.

Update - just went to Advance auto and they were out of the $1.79 Bosch, so got the $1.99 NGK plugs... not the BP5EFS, but 5TK or something like that, lol... that was all the NGKs they had for this car. Guess they are better than whats in there. Oh well. Good luck!


Last edited by 86560SEL; 09-19-2010 at 05:26 PM.
Reply With Quote
  #17  
Old 09-20-2010, 02:44 AM
mbzman's Avatar
Registered User
 
Join Date: Nov 2008
Location: Canada
Posts: 604
Quote:
Originally Posted by ps2cho View Post
You can read voltage across the terminals to test it. It is a replaceable part, but you cannot purchase it new alone. You must purchase the entire FD/Airblow block. It is a junkyard swap in reality.
How much for a used distributor?
__________________
1989 300CE
Reply With Quote
  #18  
Old 09-20-2010, 02:47 AM
mbzman's Avatar
Registered User
 
Join Date: Nov 2008
Location: Canada
Posts: 604
Quote:
Originally Posted by 86560SEL View Post
Not sure if its your problem or not, but when my moms 300SEL did this (when it was my car) it turned out to be the voltage regulator, but we also had "flickering" lights.

Now I am in the market for new plugs for her car... non-resistor plugs are hard to find... thats whats in there now, I didnt know, but one local MB mechanic said they were not good for the M103 engine.

Update - just went to Advance auto and they were out of the $1.79 Bosch, so got the $1.99 NGK plugs... not the BP5EFS, but 5TK or something like that, lol... that was all the NGKs they had for this car. Guess they are better than whats in there. Oh well. Good luck!
Yeah, the alternators are pretty weak on these cars considering the amount of electrical equipment they have. My seat heaters will often get bumped off at idle if I also have the headlights, radio and fan going. I don't think the VR is defective though. You are definitely right on the non-resistor plugs being hard to source.
__________________
1989 300CE
Reply With Quote
  #19  
Old 09-20-2010, 05:05 PM
Registered User
 
Join Date: May 2009
Posts: 398
Bosch F8DC4's are usually easy to get at dealer or auto store. It is the most common non resistor plug for most. Comes with washer and is tapered for use without.
Reply With Quote
  #20  
Old 09-21-2010, 03:16 AM
86560SEL's Avatar
Registered User
 
Join Date: Jan 2003
Location: east Tennessee (southeast USA)
Posts: 3,015
I looked those up on the Advance and Autozone websites and brought up nothing, but the Oreille site did, but said limited availability, call store for details...

http://www.oreillyauto.com/site/c/detail/BOS7/H9DC0.oap?year=1988&make=Mercedes-Benz&model=300SEL&vi=1194207&mn=Bosch&mc=BOS&forcedVehicle=true&pt=03435&ppt=C0334

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 05:15 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2023, 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