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

LinkBack Thread Tools Display Modes
Old 04-08-2002, 06:19 PM
amg280's Avatar
Registered User
Join Date: Apr 2002
Location: NY
Posts: 530
Unhappy Check engine light on 89 190E 2.6

Hello. I am having a problem with my 89 190E 2.6. I just rebuilt the head and did a valve job on it because it ran like crap. Turns out one of the valves had a big gouge in it. Its all back together and runs and idles perfect. Although the check engine light will flicker on and off and sometimes stay on. When it does this, the engine will die sometimes (if at a red light persay) or when driving, totally lose power. It just all around runs horrible and seems bogged down. when the check engine light goes off, the motor instantly runs normal. I am suspecting the O2 sensor. I had a computer from an 86 300E and I put it in to see what would happen and it runs fine with it in. The check engine light never comes on (unless I unplug the O2 sensor) and seems to run fine. My only complaint with this computer is that sometimes briefly the car will hesitate for a bit. The mixture has been recently adjusted. I really dont know what to do. Should I try a new O2 sensor and replace the original computer? Or do you not think that is suspect. What is the difference between the 2 computers. Thanks for any help.


Reply With Quote
Old 04-09-2002, 12:40 AM
Registered User
Join Date: Apr 2000
Posts: 412
If the oxygen sensor is bad the computer will default to preprogrammed settings. If the oxygen sensor circuit is bad the check engine light will come on. An intermittant problem like this is difficult to find but my guess is that it is ignition wiring. If the problem just came up suddenly it could be bad fuel or the fuel filter. Hope this helps. Let us know if the problem gets resolved or what you have done to remedy the problem.

1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T
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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
check engine light - O2 vs Coolant temp JMyers ML, GL, G-Wagen, R-Class, Unimog, Sprinter 2 11-23-2004 09:37 AM
My coolant light came on ('93 190e 2.6) AuctorEcclesiae Tech Help 4 11-30-2002 10:53 PM
Does Check Engine Light Reset Itself? screedchan Tech Help 7 09-27-2002 12:17 PM
Check engine Light! Bad idle! moomoomeow Tech Help 2 04-25-2002 09:02 AM
check engine light came on after extremely rough idling! apprentice Tech Help 8 07-09-2001 09:02 PM

All times are GMT -4. The time now is 02:45 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page