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 05-09-2001, 01:30 PM
Posts: n/a
What are the possible causes of my 190E 2.3 running rich? What tests can be performed to diagnose?
Reply With Quote
Old 05-09-2001, 01:41 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
The testing is described in the DIY section under evaluating engine controls. Complete testing will also include fuel pressure testing.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
Old 05-09-2001, 02:20 PM
Posts: n/a
Thanks for the info, Steve. I can't find the DIY section. That's probably a bad sign! How do I locate that?

Thanks for your help.

Reply With Quote
Old 05-09-2001, 02:32 PM
David C Klasse's Avatar
CheFrac is Back!
Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,352
Look at the top of the page! You can't miss it! DIY.
2006 E350 w/ 155k miles (Daily Driver)

1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
Reply With Quote
Old 05-11-2001, 10:16 PM
Posts: n/a
Help interpreting data

I went to the DIY section and consulted my PM CD reagrding testing air/fuel mixture with a multimeter. I got results that aren't what I expected.

With the O2 sensor disconnected, it started out at 6.5V and the temp indicator on the instrument panel indicated typical operating temperature. After idling for several minutes, I noticed that the ranges were increasing so I unplugged the sensor again and the voltage had risen to 6.92V. The PM cd says it should measure 2.1-4.8V.

With the sensor connected, the voltage did oscillate. The range was +1.3V to +1.7V from the 6.92V baseline with the sensor disconnected.

I also noticed when I removed the air filter lid that the "choke plate" (?) was closed when the car was not running. Is that normal? On all my domestic vehicles, I believe the resting position was open.

What fun! Thanks again for all your help.

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
1989 190e runs rich 190eguy Mercedes Used Parts For Sale & Wanted 2 01-21-2005 08:47 PM
190E running rich problem AGAIN after repair!!!HELP!!! azhari Tech Help 35 12-30-2003 12:30 PM
Rough Running 16V 190E deutschtech Tech Help 2 10-18-2003 12:56 PM
1987 190E 2.6 Running Rich?? arnelrac Performance Paddock 3 02-27-2002 01:17 PM
correct running rpms for 190E agupta Tech Help 3 08-21-2001 02:49 PM

All times are GMT -4. The time now is 11:52 AM.

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