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  #1  
Old 01-23-2012, 07:44 PM
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Join Date: Jun 2003
Location: Chesapeake,VA
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2004 C 240 fuel pressure loss

Hi all!! I am hoping that someone out there has experienced this problem before. The case is a C240 that has a fuel pressure loss after two days of sitting without starting. If the car is driven or at least started everyday there isn't any problems starting the car. I confirmed that over the weekend with a fuel pressure guage connected I had 0 psi Monday morning. I tried to start the car and after the first tip start I recycled the key once more and the car started but ran slightly rough until the fuel pressure was equalized at all of the injectors. I think I may have a bad fuel pump not holding pressure after long periods of sitting or a bad filter in this case. I heard that some filters were designed to have the ability to keep fuel from bleeding back to the tank. I also noticed that when it started that there was more smoke than normal ( it seemed ) that was coming from the exhaust. Possible injectors leaking in the cylinders causing the fuel pressure loss? Thanks for any help in this matter.
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  #2  
Old 01-24-2012, 08:13 AM
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Only bleed off points are the fuel pump, filter, or in the injection rail.

Pump OR filter is the most likely.
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  #3  
Old 01-24-2012, 12:51 PM
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You don't mention mileage, but without looking at the WIS I believe the filter is a 60K item. And it incorporates the pressure regulator, so that's the first thing to look at.

It's a basic DIY item, just get some clic-pliers for the clamps and some bar-type clamps to close off the fuel lines.
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Old 01-24-2012, 09:33 PM
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Thanks for the replys!! I will change the filter first.
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DRIVE HARD-DRIVE FAST-DRIVE TO GET THE HELL OUT OF MY WAY.

1986 190E 2.3-16 Pearl Black!!
1987 190E 2.3-16 Smoke Silver!!
1986 190E 2.5-16 Pearl Black!!
2004 CLK 500 Cabrio Designo package!!
1994 E320 Cabrio Red with black top!!
1985 500 SEL Anthracite Grey !!
2011 Subaru Impreza STI 380HP (Yeah Baby)
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