Trouble getting fuel to go into tank - '98 STS
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Cadillac Seville / Cadillac Eldorado Forum Discussion, Trouble getting fuel to go into tank - '98 STS in Past Cadillac Vehicle Discussion; Any idea why the fuel shoots back out the filler neck when attempting to fill at gasoline station. Get about ...
  1. #1
    surrfman is offline Cadillac Owners Member
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    Trouble getting fuel to go into tank - '98 STS

    Any idea why the fuel shoots back out the filler neck when attempting to fill at gasoline station. Get about half a gallon in before the fuel literaly comes gushing back out. Tried throttling the pump nozzle, doesn'rt seem to help much. Is there a vent tube blocked or crushed maybe? Only a pressure feed and return from fuel pump in-tank module. Is there a vent that is hosed to a vent solenoid that might be stuck shut? Get no codes of any kind.

    Thanks,

    Timmy C

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    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Trouble getting fuel to go into tank - '98 STS

    Sure sounds like a plugged vent. Normally there is a vent tube attached to the filler pipe, but I don't see it in the diagram for your car.
    http://www.gmpartsgiant.com/Page_Pro...-008&SortKey=9



    There should be 3 lines from the tank. Supply, return and EVAP (which may serve as a vent, but I'm not positive).
    http://www.gmpartsgiant.com/Page_Pro...-016&SortKey=3



    EVAP system
    http://www.gmpartsgiant.com/Page_Pro...007&SortKey=52

  4. #3
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: Trouble getting fuel to go into tank - '98 STS

    Doesn't the pre-2000 series have a tank vent solenoid at or near the charcoal canister ? Maybe that's used instead of a parallel fill pipe vent.

  5. #4
    surrfman is offline Cadillac Owners Member
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    Re: Trouble getting fuel to go into tank - '98 STS

    that's what i am thinkin'... evap solenoid near the tank that runs to the charcoal canister. I had a Venture van fuel module I replaced for the GF's flower shop delivery van that had a decent sized hose attached by screw clamp to a nipple at top corner of tank. It was a real pain to get to, had to hold tank with floor jack half-way up then do the "feely thing" at arm's length with the air powered nut driver, as hose wasn't long enough to do while tank was on ground.

  6. #5
    surrfman is offline Cadillac Owners Member
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    Re: Trouble getting fuel to go into tank - '98 STS

    Evap solenoid was the culprit!!! not a bad job, got a salvage yard special for $5.00!

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