1991 300E Rough Idle and CE light on - Mercedes-Benz Forum

 
LinkBack Thread Tools Display Modes
post #1 of 1 (permalink) Old 08-18-2010, 04:01 PM Thread Starter
BenzWorld Newbie
 
Date registered: Aug 2010
Posts: 1
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
1991 300E Rough Idle and CE light on

I have a 1991 Mercedes 300E with over 200K miles. Last month I had an overheating problem so I replaced the thermostat and radiator cap. That seemed to fix the overheating issue, however at one point the vehicle overheated and the engine died. Since then the vehicle idles rough as though it is only firing on 5 cylinders. Yesterday I decided to check the compression to make sure a head gasket wasn't blown between cylinders since there is no water in the oil. All the cylinders were around 120 - 130 psi but when I took out the #3 spark plug, it was fouled. I replaced all of the spark plugs with NGK's (had Autolite in there) and replaced the sparkplug wires as well. The cap and rotor were both replaced about 10k miles ago and still look good. Replacing those items didn't fix anything. If I have the vehicle in park and start it up, it idles rough but if I rev the engine up to about 2500 - 3000 RPM's, it sounds like it smoothes out but not really sure. What is the possibility of a crank shaft sensor or whatever it is that advances the timing on this vehicle. Oh ya, the check engine light is on and it looks like the only code is a 10 which tells me that the Throttle Valve Swith (Idle Contact) is faulty. Would this cause my problem?

Last edited by jethroebodeen; 08-18-2010 at 04:21 PM. Reason: Found the trouble code.
jethroebodeen is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > Mercedes-Benz Sedan Forums > W124 E,CE,D,TD Class

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











  • Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
     
    Thread Tools
    Show Printable Version Show Printable Version
    Email this Page Email this Page
    Display Modes
    Linear Mode Linear Mode



    Similar Threads
    Topic Author Forum Replies Last Post
    1991 500sl Running Rough on Idle scorpiox R129 SL-Class 10 09-07-2016 07:41 AM
    1991 500E Rough Idle hunter500 General Mercedes-Benz 4 08-15-2010 01:43 PM
    Rough idle at stop light / What is normal idle rpm? projectpete19 C208/A208 CLK-Class 3 03-11-2008 01:56 PM
    Rough idle at stop light / what is normal idle rpm? projectpete19 C209/A209 CLK-Class 0 03-06-2008 11:59 AM
    86 300E Rough Idle Guest (MBNZ) W124 E,CE,D,TD Class 11 05-09-2002 12:19 PM

    Posting Rules  
    You may post new threads
    You may 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

     

    Title goes here

    close
    video goes here
    description goes here. Read Full Story
    For the best viewing experience please update your browser to Google Chrome