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 08-24-2002, 07:17 PM
Registered User
Join Date: May 2000
Posts: 376
Erractic idle (16V). Anyone replaced a throttle body due to wear?

Still trying to get my wife`s car to idle at a steady RPM. I must have a vacuum leak and I was wondering if anyone has ever worn out a throttle body on a CIS car?

If I start the car and set the mixture without touching the throttle, I can get a smooth 1000 rpm idle. But if I rev the car the idle will hang closer to 1400 rpm. If I adjust the mixture from 1400 to get it back to 1000 rpm, then it will run rough and not start without holding the throttle open. Air flow sensor height is correct. The low vacuum is making the mixture adjustment an on/off affair.

My problems all started after cleaning the throttle body with carb cleaner. I am hypothesizing that the crud was obstructing the air flow at idle and helping seal the throttle valve. I have removed/adjusted the throttle valve to insure that it is completely closed. It did have some wear marks on the sides of the bore, but this may be normal? All throttle switches are making contact.

Thoughts? Experiences?

Reply With Quote
Old 08-24-2002, 08:52 PM
Posts: n/a


Not sure if this helps, but is it possible you disloged something when cleaning the throtle body and now that something is obstructing fuel and or air flow? Inadequate fuel or air flow could result in eratic idle.

Reply With Quote
Old 08-25-2002, 08:01 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
I have several used ones with over 250,000 miles on them & they show NO signs of wear!! IDLE problems on this engine are usually related to the AIR flow position sensor.
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
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 01:44 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