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 01-08-2003, 06:32 PM
Mark Elrod
Posts: n/a
Angry This SEC is getting ANNOYING

Need some input on a stubborn problem that is becoming very annoying. I have a 1985 500 SEC, only 215,000 and runs like a top.

However, the engine is ususlly VERY stubborn about re-starting after sitting 10 minutes to 3 hours. First thing in the morning, fires right up, regardless of temperature, after it sits all day at work, fires right up, regardless of temperature, if driven and shut off, say to fill with fuel, fires right up. But, give it 10 minutes and it is very difficult, skipping sometimes on more than one cylinder, sometimes requires re-starting, seems to be flooded. Once started, rev to 1500 or so, it clears and smooths out and runs fantastic.

I am open to suggestions? Thanks in advance.

(Also, sometimes when it is tempermental like this, the fuel pump sounds like it is cavitating, this usually abates in a few moments, but not in sync with the smooth running of the engine.)
Reply With Quote
Old 01-08-2003, 07:32 PM
Ashman's Avatar
Service Advisor
Join Date: Sep 2000
Location: Sherman Oaks, CA
Posts: 4,748
may be the fuel pump check valve. have it checked...

'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.
Reply With Quote
Old 01-08-2003, 09:01 PM
Registered User
Join Date: Dec 2000
Location: Battle Ground, WA
Posts: 576
Leaky injectors?

Hi Mark,
I'm not familiar with the 300SEC, but your symptoms are indicative of a flooded engine. Try depressing the throttle about halfway down when it doesn't start and see if it doesn't allow the engine to clear itself more quickly. Your fuel pump noise is probably due to the fuel having lost pressure and taking a little time to pump it back. You might possibly benefit from one of the snake oil fuel injector cleaners... possibly not, also.

Good luck with it,
Richard Wooldridge
'82 300D/4.3L V6
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 09:08 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