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 09-28-2002, 03:40 PM
Posts: n/a
Unhappy rough idling 420 sel

I took my 420 sel to the local MB shop to verify what I thougt to be a blown head gasket. They confirmed #3 cyl. was getting anti-freeze. I took it home for my project. On the way home it ran really ragged, would hardly idle. Going there it ran pretty good except for running warmer than normal. Not sure what happened except their leak testing.
I replaced the head gaskets and did all the top end stuff, resurface both heads, valve work, chain, etc. everything back together and the ragged idle was still there. Took it back to the MB shop to be analized, and make sure I had everything right. The tech. said I had a bad injector in #8. I replaced it, same thing. I have now replaced all with new. A little better but still rough idle and hesitant at low RPM's. It smooths out above 1700 r's.
A long story to get to the point, help, any ideas?
Reply With Quote
Old 09-29-2002, 02:18 PM
Registered User
Join Date: Dec 2001
Posts: 565
What about the spark plug resistor tips, rotor; dist. cap?
Reply With Quote
Old 09-29-2002, 07:47 PM
Posts: n/a

I replaced the wires, rotor cap and button about 1 year ago. The roughness at idle is even and consistant not so much like a electrical misfire. I'm stumped. It's almost like a vacuum advance problem. I have the CD for the 126 model but I can't find any helpful troubleshooting info in it.
Reply With Quote
Old 09-29-2002, 11:12 PM
Registered User
Join Date: Dec 2001
Posts: 565
Here's another place to hunt for info:
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

All times are GMT -4. The time now is 06:40 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