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Can't get tank to take gas! V70-XC70 1998

posted by  jpgurley on  Tue Mar 9 03:14 CST 2010
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last visit: Fri Dec 10 03:50 CST 2010
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I recently bought a 98 XC70 with a troublesome problem.
When trying to fill the tank it will only take the fuel REAL SLOWLY.
I understand that there is a valve at the bottom of the fuel filler tube that can shut off during a vapor test by the computer.
I have tried turning the key off and on, starting and stopping the engine to no avail.
The problem is so bad that I have run out of patience at about $20 worth of gas.
(And people at the service station look at me like I am taking way too long to gas up the car.)
Is there a way to force that valve open and it stay that way?
I also have a code for a small evaporative control system leak. Could it be related?
The former owner said it has been that way for a while but sometimes fills just fine.
He also has had a recent fuel pump replacement and I wondered why the problem was not address when the tank was out.
I really don't want to pull the tank on this AWD vehicle.
Any suggestions?








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    Can't get tank to take gas! V70-XC70 1998

    posted by  KlausC on  Tue Mar 9 04:50 CST 2010
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    last visit: Fri Oct 24 10:15 CST 2014
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    If you or the previous owner 'overfill' the tank, that would explain a lot. If after the pump turns off during a normal fill, do not add another 2-3 quarts. The excess gasoline will drain into the charcoal cannister, plugging the vapor line with liquid, so that the next time you fill up the vapors in the tank have no where to go but back up the filler pipe and cause the pump to shut off.

    Try driving with the tank at 3/4 full for a couple of fill ups and see if that cures the problem. $20 per fill up sounds good to me :)

    The small evap leak could also be from the charcoal cannister being full. But you need to erase the code first and if it comes back real quick, then check the vacuum elbows in the system.

    Klaus
    --
    Praying for Cynthia Amendt, heaven bound








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    Can't get tank to take gas! V70-XC70 1998

    posted by  jablackburn on  Tue Mar 9 03:45 CST 2010
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    last visit: Thu Jan 20 10:56 CST 2011
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    I think your problem is actually the valve at the top of the charcoal EVAP canister. I'm not sure where the location is on a AWD - on my S70, it is at the front just in front of the left wheel well; on older 850's, it was just in front of the rear tire.








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      Can't get tank to take gas! V70-XC70 1998

      posted by  jpgurley on  Tue Mar 9 12:00 CST 2010
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      last visit: Fri Dec 10 03:50 CST 2010
      [RELATED]

      Yeah, the Check Engine light come back on immediately even after clearing it.
      Are we talking about a vacuum sized valve at the tank or some kind of fuel filler sized valve?
      Is it just the inability to breathe?
      If so, could I send compressed air back through from the purge valve to the tank, or am I going to screw up the valve at the tank?
      Or how about compressed air from the filler neck through to the purge valve.
      You can tell I'm and "old shade tree" kind of mechanic, but my tricks always work on the red block bricks.
      This thing really doesn't take gas but at a trickle!








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        Can't get tank to take gas! V70-XC70 1998

        posted by  KlausC on  Tue Mar 9 17:35 CST 2010
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        last visit: Fri Oct 24 10:15 CST 2014
        [RELATED]

        I would never used compressed air on those lines, it could cause too many other problems. You best bet is to just drive the car for a while and hope the manifold vacuum does it's job to suck up the fumes and clean up the lines.

        Have you tried other gas stations? Not all nozzles are created equal.

        Of course, when the guys replaced the pump, they might have screwed up something at the vent hose. But they will never admit to that.

        Klaus
        --
        Praying for Cynthia Amendt, heaven bound







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