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 > Vintage Mercedes Forum

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 06-05-2014, 11:52 AM
Registered User
 
Join Date: Jun 2014
Posts: 1
Mercedes 280 SE 1979 Hard Cold Start

Hello All, i bought w116 280 se 1979 in january since then i have been trying to fix it. the car when its hot runs perfect. but i have serious problem to start it when its cold. i have changed the fuel pump, fuel distributer, warm up regulator and it is still doing the same. anyone knows what to look for to fix. i really need you help. it starts rough, sometimes dieing a few times before it warms up. Once it is warmed up, it alledgedly runs great. And if it is warmed up, shut off for a while, and started back up, it runs ok then too. thank you

Reply With Quote
  #2  
Old 06-12-2014, 09:13 PM
Registered User
 
Join Date: Oct 2011
Location: PDX->OR->USA
Posts: 377
I can't think of it's name presently but on my W111 there is a relay on the firewall that is a cold start aid, it squirts extra fuel in only on cold starts to help out.
__________________
1962 220SE W111 Coupe, 2nd owner

http://img.photobucket.com/albums/v3.../SideSmall.jpg

The Coupe Group (W111/112 coupes and cabs) official website
The Coupe Group on Facebook
MotoArigato: Roadworthy News & Humor
Reply With Quote
  #3  
Old 06-18-2014, 07:50 PM
Registered User
 
Join Date: Oct 2012
Posts: 21,832
First check your thermal-time switch for correct operation. It is a sensor looking thing that screws into the block or the head and tells the brain your engine is cold. You can do this without taking it out with a voltmeter. Just find out which side is supposed to be hot when the engine is cranked and see if you have any voltage there during cold cranking.

If it is working the next step is to see if you have current getting to your cold start valve. Then test the operation of the cold start valve.

Or you could just wait until it is cold, usually under 95 degrees F, unbolt your cold start valve, place it in an empty glass jar and have someone crank the engine. If it squirts fuel that system is OK. If not you have found the problem and now all you have to figure out is where the source of the problem lies.

Yeah, this is risky, but it is quick. Use a big jar as fuel will be squirting out at 42 psi if everything is working.

Reply With Quote
Reply

Bookmarks

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




All times are GMT -4. The time now is 09:15 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, 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