Gas CAP isues

Discussion in 'Engine & Drivetrain' started by Heldju, Apr 16, 2019.

  1. 915_Tahoe

    915_Tahoe Full Access Member

    Posts:
    294
    Likes Received:
    232
    Joined:
    Jul 1, 2018
    Name:
    Rene
    20915842 CAP, F/TNK FIL (T-TYPE TETHER) (1/4 TURN CAP) (ACDelco #GT330) (MUST ALSO ORDER HOUSING 15289921)

    last part important, "must replace housing do to design change"

    gm#15289921 $45.83 walk-in price
     
    Last edited: Apr 17, 2019
    Doubeleive likes this.
  2. Heldju

    Heldju TYF Newbie

    Posts:
    7
    Likes Received:
    2
    Joined:
    Sep 23, 2018
    Name:
    Helge
    What would be the reasons to change the housing...it doesn’t come in contact with the gas cap. I would have understood if if the wanted me to change the dinner neck.
     
  3. zbad55

    zbad55 Member

    Posts:
    60
    Likes Received:
    32
    Joined:
    Dec 1, 2017
    Location:
    Detroit
    Name:
    Carl
    You do not have to change the housing if just replacing the fuel cap. The most important part of the cap is the seal and the lip of the filler pipe where it seals. There have been issues with the lip of the filler pipe getting distorted or rusty which can cause a bad seal. Or as others have said you may have a different evap issue.
     
  4. zbad55

    zbad55 Member

    Posts:
    60
    Likes Received:
    32
    Joined:
    Dec 1, 2017
    Location:
    Detroit
    Name:
    Carl
    You do not have to change the housing if just replacing the fuel cap. The most important part of the cap is the seal and the lip of the filler pipe where it seals. There have been issues with the lip of the filler pipe getting distorted or rusty which can cause a bad seal. Or as others have said you may have a different evap issue.
     
  5. zbad55

    zbad55 Member

    Posts:
    60
    Likes Received:
    32
    Joined:
    Dec 1, 2017
    Location:
    Detroit
    Name:
    Carl
    You do not have to change the housing if just replacing the fuel cap. The most important part of the cap is the seal and the lip of the filler pipe where it seals. There have been issues with the lip of the filler pipe getting distorted or rusty which can cause a bad seal. Or as others have said you may have a different evap issue.
     
  6. Doubeleive

    Doubeleive Supporting Member

    Posts:
    5,554
    Likes Received:
    3,934
    Joined:
    Nov 7, 2017
    Location:
    Stockton, Ca.
    Name:
    Wes
    the housing may just be changed to retain the plastic strap on the cap, if this is the case you can just drill a small hole in the existing housing and attach the strap if need be
     
  7. HiHoeSilver

    HiHoeSilver Away!

    Posts:
    7,530
    Likes Received:
    7,960
    Joined:
    Feb 28, 2017
    Location:
    Chicago
    Name:
    Nate
  8. Heldju

    Heldju TYF Newbie

    Posts:
    7
    Likes Received:
    2
    Joined:
    Sep 23, 2018
    Name:
    Helge
    I have now ordered a new ACDelco cap from Rock. I will probably show up in a week or two.
    Yesterday wen I was getting fuel, I noticed a new problem. I struggled tho fill the tank. The filling gun keeps stopping. It also sounded like the tank was over pressuring. What would cause that to happen?
     
  9. zbad55

    zbad55 Member

    Posts:
    60
    Likes Received:
    32
    Joined:
    Dec 1, 2017
    Location:
    Detroit
    Name:
    Carl
    If you are getting "PSO's" premature shut off's then you probable having something wrong with the venting system. As the pressure builds in the tank it trips the nozzle to shut off. You may need to drop your tank and blow out all the lines and replace most of the evap system.
     
    Erickk120 likes this.
  10. Erickk120

    Erickk120 Full Access Member

    Posts:
    248
    Likes Received:
    110
    Joined:
    Mar 19, 2018
    Name:
    Eric
    Heck yeah! This is how mine and a lot of other peoples started. It starts as a tighten gas cap warning, you buy and oem cap and if that doesn't fix it later on it becomes a large leak, and tanks starts holding pressure, then you start smelling gas vapors after driving and parking, then its hard to fill later the tank farts when you open the gas cap after driving for a bit. The symptoms are in not particular order, but thats more or less how it went for me. I ended up doing both solenoids and charcoal canister that were bad from a leaking transfer case, and or dad overfilling when he used the truck. Overfilling is how these things start, when the pump stops you stop, or you will end up spending 150 bucks to replace evap parts. That or you might have a rusted gas tank where the filler neck, and pump meet.
     

Share This Page