Dangers of a Throttle Body Reset - Mercedes-Benz Forum

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 06-13-2009, 02:54 AM Thread Starter
JTC
BenzWorld Junior Member
 
Date registered: Jun 2009
Posts: 39
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
Dangers of a Throttle Body Reset

Following on from my problems detailed here:

http://www.benzworld.org/forums/gene...-gremlins.html

The well known throttle body reset procedure was the cause of my ignition problems.

Luckily it cleared itself this morning and the car is starting fine. The mechanic said that the problem arose from the throttle body reset in that the throttle body was not intermixing fuel and air in the correct ratio to achieve a consistant idle rev level. It will eventually get back up to the correct levels after several starts but the initial ignition start will invariably fail and you will have to keep trying.

Has anyone else had the same problem?
JTC is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 06-13-2009, 07:03 PM Thread Starter
JTC
BenzWorld Junior Member
 
Date registered: Jun 2009
Posts: 39
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
Ok, problem came back this evening.

I disconnected the battery for an hour just to make sure that the Throttle body had reset. When I reconnected the battery, it started up perfectly three times in a row.

Anyway, this evening it stalled again on initial ignition. Revs hit 700rpm then immediately dropped and died. Turning the key again without removing it starts the car up fine albeit it seems to struggle to get over 700rpm, drops to near zero before coming back up, settling at the 700rpm mark for a consistent idle. It's as if it is searching for the correct idle level. When I take the key out and restart, it dies again.

I did have the MAF sensor replaced yesterday. Could this have something to do with it? When it does start, the car is driving spectacularly. Could this be an electronic/software problem with the throttle body or something physical? Could it be the key? I'm going to try again with the spare key.

Your collective wisdom please...
JTC is offline  
post #3 of 3 (permalink) Old 06-24-2009, 12:33 PM Thread Starter
JTC
BenzWorld Junior Member
 
Date registered: Jun 2009
Posts: 39
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
Update on this. Problem is now sorted. The MAF sensor the mechanic used was a Bosch one which had compatibility issues with the throttle body settings. A genuine Mercedes one was installed and the car now starts perfectly.

The moral of this story is always use genuine parts.
JTC is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > General Mercedes-Benz Forums > General Mercedes-Benz

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
    Reset Throttle Body / Transmission '91 300CE W163 M-Class 3 07-12-2013 11:48 PM
    BAS/ASR Fixed with Electronic Throttle Actuator (ETA) and ECU reset wayneg R129 SL-Class 61 07-16-2010 05:16 AM
    Adaptive throttle reset... Subby_ R170 SLK-Class 3 07-17-2007 03:58 AM
    ^^^Throttle body^^^ Tech-Tune R129 SL-Class 32 04-28-2007 05:33 AM
    Reset Throttle? spiritd W211 E-Class 0 12-05-2006 12:14 AM

    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