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
Prev Previous Post   Next Post Next
  #1  
Old 07-21-2003, 02:09 AM
Meza's Avatar
Registered User
 
Join Date: Jan 2003
Location: SC
Posts: 148
Exclamation Idle question after rebuilding cylinderhead

The car is a 1993 190e 2.6L engine
I rebuilt the head with new guides and seals. The car started fine and idled great like before I did the head job. after about 150 miles it started to idle high after start up. To be more specific, I start the car and idle goes to about 900. Let it idle for 5 minutes and it doesn't drop. If I push the gas slightly to about 1200 rpm, it goes to it and stays there. A little more gas to 1500 rpm and goes there and stay at 1500. I noticed that when I unplug the idle valve, the idle goes back normal and stays there when I reconnect the connector to the valve. If I turn the car off and restart it, it goes high as mentioned and drops when I put the valve connector. With the valve connector off and car idling good, turning the A/C on drops the idle to about 400 and car idles failrly Ok. Turning the A/C off brings the idle to about 700 rpm (normal). My OVP is 3 months old. There are no vacuum leaks. I checked the on/off ratio at pin 3 and it fluctuate around 50 so I assumed the oxygen sensor is ok. I haven't checke the EHA current and will do that in the next 2 days. I checked the switch by the throttle linkage and it read 0 ohms at rest position (car not running) and infinety at WOT and even when I move it slightly so I assmed it is ok too. I will clean the valve tomorow with electrical part cleaner and see what happens. Any other things to look at?

PS. The issue happened after I degreesed and washed the engine if that may trigger ideas
Meza
__________________
Meza
1993 190E 2.6
Advanced Diesel Systems Test and Research Engineer
Reply With Quote
 

Bookmarks


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




All times are GMT -4. The time now is 08:42 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page