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

LinkBack Thread Tools Display Modes
Old 11-20-2002, 11:57 AM
Registered User
Join Date: Aug 2001
Location: secret
Posts: 3,044
Fuel pressure regulator leaking.

My diaphram has apparently ruptured and gasoline is filling the vacuum line. Could this also contribute to poor fuel mileage? Is there enough suction in that line to pull it into the engine, or is it going into the crankcase?
Reply With Quote
Old 11-20-2002, 12:59 PM
Registered User
Join Date: Sep 2002
Location: NE
Posts: 133

would you be willing to tell the uninnitiated a little more about your project? I am very interested. specifically I want to know why you investigated that part in the first place. and then how you knew it was leaking. I have a feeling that this part may be going on my car but don't know how to check it.

Reply With Quote
Old 11-20-2002, 04:00 PM
Registered User
Join Date: Aug 2001
Location: secret
Posts: 3,044
Here's what it looks lilike. There is a white plastic vacuum line that connects it to the rubber hose between the valve cover and the air cleaner. My line was half full of gas. Also when you remove the gas line in front, that's the return line, there shouldn't be any gas leaking out of the regulator. Car not running when you try this!!
Attached Thumbnails
Fuel pressure regulator leaking.-regulator.jpg  
Reply With Quote
Old 11-21-2002, 06:20 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
That part caused me a race car motor! filled the crankcase with gas.
Yes the rubber/plastic line is only a vent. Shouldn't have much effect on fuel mileage unless it fills up the oil pan!
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 11-21-2002, 07:10 PM
Registered User
Join Date: Aug 2001
Location: secret
Posts: 3,044
Thanks Doc!

Sorry to hear about the engine it killed. Would it be better to vent it to atmosphere? That is as long as it's working properly and not pointed at a fire hazard!!
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 10:35 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