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 11-03-2007, 02:08 PM
Registered User
 
Join Date: Mar 2001
Location: Schenectady, new york
Posts: 229
S420 1995 running rich

Having problems with my new '95 S420, 177,000 miles, unknown prior maintenance. Engine light came on, started running rough, rich and with practically no power car stopped. Get it home, check the distributor caps, worn with massive arcing, don't believe they had ever been changed. Replaced both caps and rotors, cars idles nice again, engine light still on, still running very rich, strong gasoline smell from the exhaust. I check the LED/button code reader get codes 4,5,6,7, and 25. Clear each code individually restart engine four times after letting it idle for a couple minutes in between each start. No codes recur, after three days, however still running rich, no power at all. Any ideas?
__________________
jcciem
'94 SL5000 60,000
'91 350SDL 545,000
'91 350SD 197,000
'00 E55 AMG 77,000
Reply With Quote
  #2  
Old 11-04-2007, 10:55 AM
JimF's Avatar
'94 S500: only 793 sold!
 
Join Date: Mar 2001
Location: San Diego, CA
Posts: 1,929
Those codes are:
4 Air injection system faulty <--- broken vacuum lines??
5 Exhaust gas recirculation faulty <--- EGR sensor or line plugged?
6 Idle speed control faulty <--- could be ETA . .Menu#24??
7 Ignition system faulty <--- ditto above.
25 Knock sensors faulty

You can codes from my page, MENU#6 (Diag Module).

Check MENU#24 for ETA problems and how it starts. . .
__________________
Regards . . . . JimF
-------------------
'94 S500 Cpe

Visit my Mercedes Web Page
Reply With Quote
  #3  
Old 11-16-2007, 01:24 PM
Registered User
 
Join Date: Mar 2001
Location: Schenectady, new york
Posts: 229
Bad coil

Good news, turned out all it needed was a coil for one side of the engine, replaced the coil runs perfectly!
__________________
jcciem
'94 SL5000 60,000
'91 350SDL 545,000
'91 350SD 197,000
'00 E55 AMG 77,000
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 06:18 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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