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 05-06-2002, 11:12 PM
Posts: n/a
Unhappy 85' 190e runs rough when cold

Can any one help? I have 85' 190e 2.3 and it runs rough when cold .
specifically hard to start 4-5 cranks. then it idles fine but to try and throttle off idle it spits and sputters until its hot then runs well.
I suspect either cold start valve, auxiliary air device, or the electromagnetic pressure actuator. Can anyone give me ohm readings for these parts so I don't spen a fortune replacing things I don't need. Any other help would be greatly appreciated.
Thanks, Sean
Reply With Quote
Old 05-07-2002, 08:43 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The fuel system computer must power up the EHA (fuel control regulator) so that the engine can run rich when cold.
Sounds like the over-voltage relay isn't powering up the computer. This is a common problem.
Also many times the wires at the EHA break & no power can get there to richen the mixture.
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
Old 05-07-2002, 11:33 AM
Posts: n/a
just one piece of experience - my 190e 2.3 (85) was running rough when cold - replaced plugs, cap/rotor, wires, injectors, air/fuel filter, OVP relay, etc. - nothing helped. replaced the oxygen sensor, runs absolutely fine now, even on cold engine. Maybe something else in your case though!
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 12:54 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