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

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-24-2023, 01:34 PM
Registered User
 
Join Date: Jun 2002
Location: Northeast
Posts: 251
1988 300SEL no start

No start condition, cranks over.

I pulled the fuel relay, jumped the relay and the puel pump runs, but in crappy kind of way - kind of gurgles, not a smooth usual fuel pump kind of purring. When turning the key, the car still does not engage and run while the relay is jumped.
When I remove the jumper wire and crank the engine, the car turns over and kind of wants to start for a millisecond and dies. This does not occur when the relay jumper wire is in place.

When I put the fuel pump relay in, the car fuel pump does nothing. No noise or any signs of running.

So i am assuming it's s fuel issue. I'm thinking, specifically a fuel pump issue, but wanted some opinions before I buy a fuel pump.

Thanks!!

Dwayne.

Reply With Quote
  #2  
Old 04-24-2023, 01:53 PM
Registered User
 
Join Date: Sep 2001
Posts: 3,022
May be more than one problem, did the car run ok and then this happened? Is there definitely enough fuel in the tank? If yes then the pump may be bad, change it and the filter.

Needing to jump the relay, check and confirm power to and through all fuses. A bad ignition switch can cause no power to close the relay. If there is switched power to the relay then the relay is bad. A failing pump can damage a relay.

Good luck!!!
__________________
"Rudeness is a weak man's imitation of strength" - Eric Hoffer
Reply With Quote
  #3  
Old 04-25-2023, 02:44 PM
Registered User
 
Join Date: Jun 2002
Location: Northeast
Posts: 251
Thanks, I'll update when I get this sorted out - Dwayne
Reply With Quote
  #4  
Old 04-28-2023, 01:51 PM
Registered User
 
Join Date: Mar 2003
Location: Southern California
Posts: 2,286
... could be multiple problems. Check out this thread, especially the last post.

M103 starting problem

The failure analysis is reported in this thread:

KE fuel accumulator destructive failure analysis

Duke
Reply With Quote
  #5  
Old 08-17-2023, 05:51 PM
Registered User
 
Join Date: Jun 2002
Location: Northeast
Posts: 251
Wanted reply to give an answer to my problem in case others search this thread in the future...
Because of the strange sounds I decided to replace the fuel pump.
Seems to have solved the problem.
On occasion, it will stall if it sits for a while, but will start right up and remain started.
That's another problem for another day.
Thanks for all the suggestions.
Reply With Quote
  #6  
Old 08-17-2023, 08:06 PM
Registered User
 
Join Date: Sep 2001
Posts: 3,022
Thanks for completing the thread. Is the stalling on a cold start and then it continues to run after a restart?
__________________
"Rudeness is a weak man's imitation of strength" - Eric Hoffer
Reply With Quote
  #7  
Old 08-24-2023, 05:23 PM
Registered User
 
Join Date: Jun 2002
Location: Northeast
Posts: 251
Np Sugar Bear...my pleasure!!
One thing that drives me a little crazy is when people ask for help and never reveal what the problem was and what corrected the problem...Anyway, the stalling problem occurs when the car sits for over a week. When it stalls, it starts right up after the stall and then the stalling doesn't occur again...unless it sits for more than a week. Thanks again everyone!
Reply With Quote
  #8  
Old 08-25-2023, 08:02 AM
Registered User
 
Join Date: Aug 2023
Posts: 2
thanks for sharing the solution!
Reply With Quote
  #9  
Old 08-25-2023, 09:35 AM
Registered User
 
Join Date: Sep 2001
Posts: 3,022
The stalling can be valve seals. Oil buildup and carbon on the valves and spark plugs absorbs the initial supply of gasoline and will cause a one stall situation on start up. Pull the spark plugs and look for fouling build up on one side only of the ceramic insulator. If you find build up on one side only it's probably bad valve seals.

__________________
"Rudeness is a weak man's imitation of strength" - Eric Hoffer
Reply With Quote
Reply

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 08:01 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Friendly URLs 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