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 ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-29-2000, 10:23 PM
MikeTangas's Avatar
Senior Member
 
Join Date: Apr 2000
Location: So. Cal
Posts: 4,430
Today was kind of a damp day here, plus I finally got around to cleaning the frame under the steering pump. In doing so I carefully used high pressure only on the affected area, careful not to douse any electrical components.

As I sat there with the engine idling I could hear a steady pop, pop, pop, which sounded like a spark going to ground. I started checking the wires (which appear to be original) and could not find any arcing. But when I looked into the spark plug recess at #8 I could see the spark going to ground. The spark looked like it was coming from under the resistor end.

Is this a sign of a bad resistor end, or is it due to damp conditions, made worse by adding more water? Examination of the inner face of the resistor end shows some burn, which leads me to believe this has been on going, although today was the first it was bad enough to hear.

------------------
Mike Tangas
73 280 SEL 4.5
Reply With Quote
  #2  
Old 10-30-2000, 07:55 AM
WDurrance
Guest
 
Posts: n/a
Hi Mike,
I would guess that the resistor end is bad. But you can check the wire with an Ohmmeter. The ends are either 1K or 5K (read the markings on it). That should tell you what you need to know.
Regards,
Randy D.

------------------
W.R.Durrance
ASE Master Tech
Mercedes Tech 21 Years
68 250SE
68 SAAB 96 Ice Racer
69 300SEL 6.3
70 300SEL 3.5
81 300TDT
W.R.Durrance Engineering
Reply With Quote
  #3  
Old 10-31-2000, 05:45 PM
MikeTangas's Avatar
Senior Member
 
Join Date: Apr 2000
Location: So. Cal
Posts: 4,430
OK, sitting here with the resistor end in hand. There are no markings on it other than a "6" molded in the lip at the wire end. With the ohmmeter set at 20K, I get a resistance reading of 5.24, I get no reading at lower settings (at higher setting I get 200k - 5.2, 2000k - 005).

I'll see if Franz, my local MB tech has a good one off the parts car for comparison.

------------------
Mike Tangas
73 280 SEL 4.5
Reply With Quote
  #4  
Old 10-31-2000, 05:52 PM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The resistance can check out OK, but if spark bleeds thru & you can see arching then a new one is needed.

------------------
MERCEDES BENZ MASTER GUILD TECHNICIAN (6 TIMES)
ASE MASTER TECHNICIAN
27 YEARS DEALER M.B. Shopforeman
190E 2.3 16V ITS SCCA racecar
Reply With Quote
  #5  
Old 10-31-2000, 06:08 PM
MikeTangas's Avatar
Senior Member
 
Join Date: Apr 2000
Location: So. Cal
Posts: 4,430
After putting everything back together I ran the engine to check for arcing. No arcing at all, tried wiggling the wires and trying to move the resistor end only thing I didn't try was moistening the area again. I will change the end, as M.B.Doc says, since the arc did bleed through. We are starting the rainy season and the damp conditions are sure to aggrevate the problem.

While I had the ohmmeter out, I also checked the resistance on the plug wire. Again at 20K, the wire showed resistance at 1.18 ohms and as before, no reading at lower settings.

------------------
Mike Tangas
73 280 SEL 4.5
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Learning experience: bad idle, black smoke, hesitation, stalling, lack of power rvenerac Tech Help 1 02-08-2004 02:07 PM
Oil caught in muffler from bad turbo billy_witort Diesel Discussion 2 01-23-2004 03:11 PM
How to confirm bad turbo? MarkM Diesel Discussion 11 01-21-2004 08:53 PM
bad "CAR"Ma? Ashman Off-Topic Discussion 2 05-10-2002 01:36 AM
bad glow plug or electrical problem? JHZR2 Diesel Discussion 1 04-24-2002 03:23 AM



All times are GMT -4. The time now is 08:11 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page