Can only fill up 8.5 gallons

Discussion in 'Gen 2 Prius Main Forum' started by Tony714, Apr 1, 2019.

  1. Tony714

    Tony714 Junior Member

    Joined:
    Feb 7, 2019
    55
    10
    0
    Location:
    Orange County
    Vehicle:
    2005 Prius
    Model:
    Base
    Hey guys, newbie question here. For two fillups now, I cant put in more than 8.5 gallons. The gauge goes up full tho.

    What gives? Is there a pressure relief valve in the fuel neck?
     
  2. 09Prius2

    09Prius2 Member

    Joined:
    Aug 20, 2016
    201
    79
    0
    Location:
    FL
    Vehicle:
    2009 Prius
    Model:
    Two
    Its a rubber bladder. Its supposed to hold 11 but it expands and contracts with heat.

    In theory each bar on the guage should represent 1 gallon and the last flashing bar 1 gallon = 11.

    Ive been able to add 13 before when its hot. Usually much less when cold, sometimes can't get much in it all.
     
  3. jerrymildred

    jerrymildred Senior Member

    Joined:
    Oct 28, 2016
    7,190
    8,848
    0
    Location:
    Tampa, FL
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    A perennial complaint with the Gen 2 Prius. I didn't often get much more than that in mine. Summers were better because the rubber was more flexible.
     
    Prodigyplace likes this.
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    86,262
    38,163
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    try waiting a few minutes after removing the gas cap. pump slowly, try different pumps, try holding the nozzle at 90 and 180 degrees.

    8.5 is actually pretty good compared to some.
     
    jerrymildred likes this.
  5. TMR-JWAP

    TMR-JWAP Senior Member

    Joined:
    Aug 12, 2016
    2,766
    3,280
    0
    Location:
    Columbia, SC
    Vehicle:
    2007 Prius
    Model:
    Touring
    I think my typical fill is 8 - 8.5 gallons. Even with owning 4 different Gen 2s, that just seems to be the sweet spot every time when I reach the one dot level. Never had much reason to stretch a tank further than that..
     
    jerrymildred likes this.
  6. Tony714

    Tony714 Junior Member

    Joined:
    Feb 7, 2019
    55
    10
    0
    Location:
    Orange County
    Vehicle:
    2005 Prius
    Model:
    Base
    Ummmm, ok. Is this a thing? Is Toyota ok with this being common?

    My biggest gripe is that I never knew this before I bout The car
     
  7. Skibob

    Skibob Senior Member

    Joined:
    Sep 14, 2018
    2,716
    1,389
    0
    Location:
    Northern California
    Vehicle:
    2006 Prius
    Model:
    N/A
    How much different is a gen 3 no liner gas tank vs a gen 2 tank?
     
  8. wjtracy

    wjtracy Senior Member

    Joined:
    Sep 19, 2006
    10,820
    3,315
    1
    Location:
    Northern VA (NoVA)
    Vehicle:
    2006 Prius
    8.5 gals would be like a brand new Gen2. 6.5 is best we can do now.
     
  9. VFerdman

    VFerdman Senior Member

    Joined:
    Jul 5, 2017
    1,070
    1,075
    3
    Location:
    Western Massachusetts
    Vehicle:
    2007 Prius
    Model:
    Three
    My 2007 can accept up to 10+ gallons in the summer. Winter is 8-9 max. Such is the nature of the beast.
     
  10. Tony714

    Tony714 Junior Member

    Joined:
    Feb 7, 2019
    55
    10
    0
    Location:
    Orange County
    Vehicle:
    2005 Prius
    Model:
    Base
    Good to know. But I live in SoCal. It’s freakin summer here all the time. And what’s really tripping me out is the gauge says it’s full.
     
  11. TMR-JWAP

    TMR-JWAP Senior Member

    Joined:
    Aug 12, 2016
    2,766
    3,280
    0
    Location:
    Columbia, SC
    Vehicle:
    2007 Prius
    Model:
    Touring
    Maybe it IS full....if it won't accept any more fuel.....guess what? It's full....

    Maybe the low end reading is off a bit and you still have 3 gallons in it ???

    If being able to drive more than 375 miles before having an 'indication ' to fill up is this much of a crisis, start driving around with a 5 gallon can of gas and just run it dry. Then you can see exactly how much it will take for a complete fill.
     
    Skibob likes this.
  12. Skibob

    Skibob Senior Member

    Joined:
    Sep 14, 2018
    2,716
    1,389
    0
    Location:
    Northern California
    Vehicle:
    2006 Prius
    Model:
    N/A
    You never mentioned how low your gauge was when you filled up. 1 flashing pip?
     
    kenoarto and fuzzy1 like this.
  13. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    13,312
    6,864
    90
    Location:
    Western Washington
    Vehicle:
    2012 Prius
    Model:
    Three
    To repeat a question already asked: how far down did you run the tank before refilling? If you didn't run it down to fuel fuel starvation, actually running out of gas and getting stranded along the roadside, then you are not testing the full refill capacity. And most drivers don't really want to run out. ;)

    Most cars have some safety margin built in to the gauge. With the Prius, this is supposed to be about 2 gallons from the very last low fuel warning.

    But the problematic Gen2 fuel bladder often bulloxes everything. It was a good idea whose time hadn't really arrived yet, so was abolished for Gen3. Some Gen2 drivers have no problem at all, while others run into a lot of variable tank shrinkage problems.
     
Loading...