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 ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 04-26-2002, 05:37 PM
Posts: n/a
380SE-- hard starts after fuel pump replacement

I have an 85 380SE which required replacement of the fuel pump. It was dead. After pump replacement I've found that with a cold engine, it starts immediately then dies. It will do this 2 or 3 times before it just turns over without starting.

I've also found the only way to get it running is by pouring a few ounces of gas in the air intake. This gets it going but it runs rough for a few minutes. Even after it smooths out, it takes even longer before it can be accelerated without bogging down.

Eventually it runs perfect, just as it did before the pump went out. If turned off, it restarts easily for 10 or so minutes. At that point although it easily starts and remains running, it shows signs of bogging down when accelerated. If turned off an hour or two... you're back to using gas to prime it to get things going.

It runs perfect when warm, and has new plugs, rotor and cap. I've tried shorting the relay pins to force the pump to run but this has no effect. The replacement pump is NOT a Bosch.

Is a check valve failing allowing fuel to return to the tank? Why does 'priming it' get it started while 'cranking it' several times does not? All suggestions are greatly appreciated!
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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 02:45 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page