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Converting 15 gallon gas tank to 19 gallon by cutting tank vent hose?

Discussion in 'Wrangler TJ (1996-2006)' started by Raven Gray, Apr 28, 2021.

  1. Apr 28, 2021 at 8:52 PM
    #1
    Raven Gray

    #1
    Raven Gray [OP] Member

    Joined:
    Apr 23, 2021
    Member:
    #5568
    Messages:
    11
    Vehicle:
    97 TJ 2.5 Lil Dog
    Has anyone heard of or had experience converting the 15gal gas tank to 19gal by simply cutting the tank vent hose? If so, did that change the pump/sensor performance?
     
    Raven Gray, Apr 28, 2021
    #1
  2. Jul 5, 2021 at 2:56 AM
    #2
    Groundfault

    #2
    Groundfault Well-Known Member

    Joined:
    Jul 4, 2021
    Member:
    #5769
    Messages:
    120
    Gender:
    Male
    First Name:
    Tim
    Vehicle:
    87 Wrangler, kind of...
    5.7 V8 with Whipple Supercharger, TH350 w/B&M Shifter, NP205 TC, Dana 60 front 4.56, GM 14 bolt 10.5 rear 4.56, 4 wheel discs, Bilstein shocks, 6" lift on 37's, Autometer gauges, all led lighting and a few other things.
    Although I have the 20 gallon poly tank, I know it can be don on a YJ. My understanding is that the 2.5 TJ also has the same issue, a 19 gallon tank that you can't fill past 15. Easy way to get an additional 5 gallons (or 4 in your case). Lots of info online about how to do it. If the vent line won't pull up, you may have to remove fuel pump and cut all but about 1.5" off the vent line. Shortening the vent line allows you to fill the tank to capacity without the pump shutting off. It will have no effect on your fuel pump, but using the 15 gallon sending unit will probably leave your fuel gauge on the full mark till you drop below 15 gallons.
     
    Groundfault, Jul 5, 2021
    #2
    aggrex likes this.
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