Parts Catalog Accessories Catalog Tech Info Tech Forums
  Search our site:    
 Cart  | Project List | Order Status | Help    

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 12-16-2000, 09:17 PM
Posts: n/a
Can someone help me solve a rough running 300sel problem. To me it looks like an elect. glitch somewhere. Car runs ok on idle (misses just a bit) but when stepping on gas it gets progressively worst to the point that engine won't spin over 3000rpm (backfires, coughs .....). Brand new spark plugs, wires, distributor and rotor plus lambda sensor installed. It helped some but not much. Using M-B, I checked ignition system: timing is ok with cold and warm engine, dwell angle looks to be ok (30), vacuum advances ign. as req., ign. coil seems to be ok. One thing I noticed during timing check with timing light was that as engine was missing timing light was skipping/missing too. As rpm were approaching 3000 engine was stumbling and timing light was "to". Is this a bad coil or ignition module? Also there
is a lot of black sod coming out from exhaust pipes.
Thanks in advance for any help.
89 300sel 200K
Reply With Quote
Old 12-17-2000, 12:53 AM
Registered User
Join Date: Dec 2000
Location: Bridgetown, Nova Scotia
Posts: 549
Have you boosted your car lately? This is just a suggestion but you may want to have a look at the fuse under the hood. It is located behind the firewall appx. in the center. It is a little fuse cover. Open it and check it. You probably have already but if this is blown the engine will run very rough.
Reply With Quote
Old 12-17-2000, 12:52 PM
Posts: n/a
Fuse is ok, actually overvoltage protection relay is brand new with two fuses on the top.
Reply With Quote
Old 12-17-2000, 09:36 PM
Posts: n/a
Can someone give me educated suggestion, should I go after a ign. coil or main module?
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
My 4.5 is running rough Litton Vintage Mercedes 6 11-08-2004 06:37 PM
97 E320 Running Very Rough MarekW Tech Help 46 06-09-2003 08:56 PM
1986 Euro 190E 2.3-16 Suddenly Running Really Rough - Any Suggestions? JimSmith Tech Help 2 02-15-2002 09:56 PM
300SEL ROUGH IDLE SHINDE.S@EMS-T.CA Tech Help 6 06-17-1999 09:49 PM
300SEL Rough Idle ChrisH Tech Help 2 04-03-1999 11:21 PM

All times are GMT -4. The time now is 09:34 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, 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