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
  #1  
Old 01-23-2009, 09:15 PM
Registered User
 
Join Date: Jan 2009
Location: silver strand beach, ca
Posts: 8
1995 E320 Runing Rough

I have a 1995 E320 with 180K miles. Ive had the car for 6 years. Its running rough. I did the self diag. button and it pointed to MAF sensor. Code 4&10. I changed the MAF sensor and cleared the codes. It still runs rough and its giving me code 10. MAF sensor. I just built the code reader and got the following codes 10 Pin 8 4&13 Pin 14 2,5&11. Im not quite shure what to do next. The venor I got the MAF sensor is going to get me another one not sure thats the problem. Any ideas?

Reply With Quote
  #2  
Old 01-23-2009, 09:19 PM
Registered User
 
Join Date: Dec 2006
Location: beautiful Bucks Co, PA
Posts: 961
Has the engine wiring harness been replaced?
Reply With Quote
  #3  
Old 01-23-2009, 09:22 PM
Registered User
 
Join Date: Jan 2009
Location: silver strand beach, ca
Posts: 8
Yes about 4 years ago
Reply With Quote
  #4  
Old 01-23-2009, 09:42 PM
Registered User
 
Join Date: Feb 2008
Posts: 223
Have you checked your ignition coils, sounds like one or more cylinders may not be firing.......
Reply With Quote
  #5  
Old 01-23-2009, 09:47 PM
Registered User
 
Join Date: Jan 2009
Location: silver strand beach, ca
Posts: 8
No I havent but it runs ok at cruising speed. 75mph. but rough acceleration. I checked the plugs and they all look lean light brown. Can coils be intermitten?
Reply With Quote
  #6  
Old 01-23-2009, 09:51 PM
Registered User
 
Join Date: Dec 2006
Location: beautiful Bucks Co, PA
Posts: 961
The short connector under the coil has been a source of problems. They are rather cheap and easy to replace. But I would first replace the spark plugs if they haven't been changed since you replaced the MAF.
Reply With Quote
  #7  
Old 01-23-2009, 10:12 PM
Registered User
 
Join Date: Jan 2009
Location: silver strand beach, ca
Posts: 8
Ill but a set of plugs and wires next it need the anyway
Reply With Quote
  #8  
Old 01-23-2009, 10:30 PM
Moderator
 
Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,538
Don't replace the coil wires. They are rarely the problem.

Replace the connectors under the coils. They are usually the problem. Here is a quote from a post by Arthur Dalton:

"Ok ..here is what to look for on those connectors..[ just the ones under the coils].. They don't "snap connect" to the plugs like the other 3 wire lead plugs that stand alone ..and b/c they are under the coil, benz used a simple spring arrangement that just pushes down on the top of the plug connectors from the force of the seated coil..not a good connection set-up, but I see why they did it with the coils being on top of the plugs...anyway, if you look in there and see any heat fatique or grayish ash type residue, or spring degeneration on that spring and connection, that is where the failure and misfire has/is occurred.. look for any carbon type tracking right there and around the plug base....an ohm reading of the connector does not address this condition. Each coil fires 2 spark plugs at the same time [ Waste Spark System] in Series, so a poor connection at this point will cause a misfire very easily ..which is why most Techs [ knowing this failure rate] just change those 3 connectors when changing plugs. As I posted earler, once the HFM [ ignition] module sees this misfire , it cut off injection, so the misfire is pronounced and often erratic. A scope does pick these up , but if one does not have that, a close look at those connections may show the condition.. I am pretty sure I advised you when you did the harness to go with the Bosch Super Coppers , so it is most likely that you do have/ did go w/F8DC4's ..and I only stress that point b/c 104 are very fussy about plugs being a Waste system.. and they HATE plats!!!!"
__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
Reply With Quote
  #9  
Old 01-23-2009, 10:51 PM
Registered User
 
Join Date: Jan 2009
Location: silver strand beach, ca
Posts: 8
Thanks for that. I wont change the wires just the connectors under the coils
and plugs
Reply With Quote
  #10  
Old 01-24-2009, 12:13 AM
Moderator
 
Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,538
Good....Arthur Dalton is your best friend for your chassis. Check out his posts and you'll usually find your answer.

__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
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 05:22 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page