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Won't restart after running our of fuel 200 1987

87 240 DL, I ran out of fuel headed down a grade, but pulled off to a slightly uphill frontage road. After refilling the tank with 4 gallons, the car cranks but won't fire. Prior to this, I never experienced any problems with starting. Is this a dead pump, or???








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    Won't restart after running our of fuel 200 1987

    Thanks for the advice everyone. It was, in fact, the relay and nothing more.

    This was my first visit to the board and, especially as this is a project car, will not be my last!

    JC
    --
    JC








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    Another theory about this - just a theory. 200 1987

    There is air locked in the main pump, filter, fuel line and rail which needs to be forced out with pumped fuel. The only pump capable of getting fuel into the main pump to do that is the tank pump.

    The only pump capable of getting fuel or the air ahead of it past the fuel pressure regulator is the main pump.

    If the hose joining the tank pump to the sender assembly outlet pipe has any holes in it (if it is original it probably does) four gallons of gas will not be enough to purge that line and get gas into the main pump.

    One remedy would be to crack open the fuel line connection at the fuel rail before the regulator and crank until fuel flows. Have someone with experience do this if you feel less than completely comfortable with line wrenches and fuel squirting around under the hood.

    An alternative remedy would be more fuel in the tank to cover the holes in the hose, and force a gravity feed of the main pump. At least a half tank I hear.



    If you can push the car around so it faces downhill... there's a chance.


    --
    Art Benstein near Baltimore








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      Re this theory: make sure your in-tank pump is working (NMI) 200 1987








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        Testing Tank pup operation 200 1987

        Connect one end of a jumper wire to the left (hot side) of any fuse 6 thru 10.

        Remove fuse 4, and connect the other end of the jumper wire to the fuse 4 right (fused side) contact.

        The Tank pump should run immediately. Listen at the gas filler for the hum. (This does not test the feed hose in Art's photo — just the pump operation.)

        With fuse 4 in place, both the Tank and Main pumps will run. But in this case, it's better to connect to the fuse 4 Left contact . Otherwise the Main pump draws current thru the Tank pump fuse, which may blow.
        --
        Bruce Young
        '93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.








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    A theory about this 200 1987

    If you really did run out of gas rather than having your fuel pump or relay or ECU fail when the tank was just about empty:

    It's winter. You had some condensation at the bottom of the fuel tank. When you ran out of gas, the last thing the fuel pump pumped was that water. Now it's clogging your fuel filter and preventing the passage of gas.

    Try changing the filter.

    It's never happened to me but I've been warned about this possibility.

    Was your previous fill up from a small and or/brand X station that doesn't move a lot of fuel? A station's storage tanks can accumulate condensation as well. You might have gotten some water pumped in with your gas, and it didn't affect you until you ran dry.

    I've heard advice that you don't want to buy gas just when the tanker truck is pulling up to refill the station's storage tanks. That means they're selling off the bottom of the tank at that moment--and if there's any condensation in the tank that's when it'll get pumped out to your car.

    Good luck.

    Doug Harvey








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      A theory about this 200 1987

      IMHO, you're always pulling from the bottom of the tank. Otherwise one would have to engineer a more complicated draw point that moves up and down within the tank in relation to fluid level. But as I write this, it would be a way to ensure you're always getting the fuel which would be floating on top of any water.

      I think I have get back to work now, I've wasted too much thought on this ;->

      -JonB. '83 245DL








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      A theory about this 200 1987

      "I've heard advice that you don't want to buy gas just when the tanker truck is pulling up to refill the station's storage tanks. That means they're selling off the bottom of the tank at that moment--and if there's any condensation in the tank that's when it'll get pumped out to your car."

      I also heard that after a tanker truck has refilled the storage tanks, the sediments and what not are floating about within the tanks due to the in-rush of new fuel disturbing the things resting at the bottom. think of pouring water into a tank with dirt on the bottom and you can see how the dirt gets stirred when you pour it too fast. I try not to get gas at a station that has just had a refill or is in the process of being refilled.








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        OOOooohh...good point (NMI) 200 1987







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