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#1
07-14-2009, 01:59 PM
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New aux. pump. Now car won't shut off!
Because I run various crap in my tank (veggy oil) I wanted to safeguard and install a large pre-pre filter as I have clogged a couple of the inline filters already (I’ve since perfected my oil processing). So I installed a transparent whole house filter with a 5 micron element. To help with the extra restrictive burden, I installed a small universal electrical fuel pump that comes on when the key is turned to the ignition postion and off accordingly. I tested it out yesterday and all was well until I turned the car off. The pump went off and the car continued to run it was a couple minutes and I hit the manual shutoff. Im not sure how much longer it would have run.
So my suspicions are the elec. pump pressurized the 3 filters and lines and was still feeding the system until it all equalized, but I’m also confused because I just figured (not too familiar with this car yet, only owned it for about 2 months) that there was an electrical solenoid that shuts off the incoming fuel to the IP and would block off even pressurized fuel. Can anyone solve this mystery? 
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#2
07-14-2009, 02:02 PM
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what vehicle? It's almost certain there is not an electric solenoid that cuts off fuel. The shut off valve is vacuum operated and you have probably caused a leak in the vacuum system somewhere when working on the car making the shut off inoperable.
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1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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#3
07-14-2009, 02:19 PM
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I would recomend you stop running your car on that crap. Run the motor on diesel, thats what it was designed to run on. Use anything else and you will dramatically shortening the engine life.
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1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg
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#4
07-14-2009, 02:46 PM
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I guess this is your SD? Like Kerry said - you probably knocked a vacuum hose off putting the 5 Micron filter in. Check the hose to the shut off valve and/or turn off the accessory pump and see if that makes a difference.
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BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif 15 VW Passat TDI 00 E420 98 E300 DT 97 E420 Donor Car - NEED PARTS? PM ME! 97 S500 97 E300D 86 Holden Jackaroo Turbo D 86 300SDL (o\|/o)
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#6
07-14-2009, 05:01 PM
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Whole house filters are supposed to bypass at pressure drops over 7psi, which would be worse than no filter at all, because when you have no filter at all, you act accordingly.
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CC: NSA All things are burning, know this and be released. 82 Benz 240 D, Kuan Yin 12 Ford Escape 4wd You're four times It's hard to more likely to concentrate on have an accident two things when you're on at the same time. a cell phone. www.kiva.org It's not like there's anything wrong with feeling good, is there?
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#7
07-14-2009, 08:52 PM
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Yes this is my 300sd. OK I'll check the vac lines. the filter setup is all in the trunk so I don't think I could have done anything back there.
The filter is fairly simple, in/out, so there is no bypass at certain pressure. Ill keep an eye on it to make sure it works properly. I just liked it over a regular auto filter because of its volume and the transparancy, so I can constantly keep an eye on it, and what can I say I am a glutton for punishment and a cheapskate so Im still gonna mess around with the WVO , but just be extremely careful with it to keep this benz going. Thanks for the help guys. PS. So there is no way that this may be caused from the added pressure of the electric pump?
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