Replaced fuel pump, but wont' take fuel.

Discussion in 'Engine & Drivetrain' started by ooney, Oct 5, 2017.

  1. ooney

    ooney TYF Newbie

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    Just replaced the fuel pump in my 2007 Yukon. Went to gas station to get fuel. Won't take it, keeps kicking it off and spilling out. Have taken it back to place that did the work. They have no clue. This will be the third time taking it back. Help!
     
  2. swathdiver

    swathdiver Full Access Member

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    They didn't connect something back right, from a simple vent hose to an electrical connector like the evap valve for example. Make sure they hook it up to their Tech2 or equivalent as it will tell them what is wrong.
     
  3. ooney

    ooney TYF Newbie

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    Thanks, I will mention it to them. As, I am dropping it off again tomorrow.
     
  4. lawfarm

    lawfarm Member

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    Or an evap hose is kinked.
     
  5. tsuintx

    tsuintx Full Access Member

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    Ah yes..., the pain of getting one of these filled up. Had the same issue with my wife's 07 most of this year.

    Plenty of things in the EVAP system to cause that. Hopefully it is just a kink in the vent hose or blocked filter at the end of it.

    Could also be fuel tank pressure sensor or one of the other EVAP system parts. Are you getting any CEL codes?

    If/when you get the issue fixed, the main thing to do to prevent it from happening again is to never top off your tank. Stop when ever it clicks the first time around.
     
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  6. swathdiver

    swathdiver Full Access Member

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    Last night the pump kept clicking off after only a half gallon at most. After a few minutes of that nonsense I drove across the street and filled it up without issue. The problem is not always our trucks. I had my Tech2 with me and the fuel and evap systems are/were working perfectly. Refueling done with the engine running 99% of the time.

    In my old cars I would often run them nearly dry and then make sure there was gas even in the filler neck, the pump reading more than the capacity of the tank. But these new trucks are not that way, they have a void or built in air gap (no sure of right word to use) and rarely get more than 26 gallons in the tank when it reads 10% on the Tech2. The Tech2 says the tanks capacity is 31.2 gallons. Published literature says 31.5 or 31.6 gallons. So I reckon there's a near unusable portion of about 4 gallons (2 or 3 gallons of fuel sloshing around at the bottom and 1-2 gallon air void) and think the most we ever pumped into it at one time was just over 28 gallons.
     

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