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Why is one wheel always at low psi even after new tires?

Discussion in '1st Gen. Tacomas (1995-2004)' started by Logans2001, Apr 27, 2022.

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  1. Apr 27, 2022 at 11:41 AM
    #1
    Logans2001

    #1
    Logans2001 [OP] What’s crackin’

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    Just before I got new tires I noticed my back left tire would be low a few times at 17 psi where all the other would be around 32 psi where I want them. I figured that one must have a small leak and that my new tires would fix that. Just got these kendas on a few weeks ago and I noticed the same back left wheel was at 8 psi this morning! Suppose to be at 38ish. So I’m a little confused since it can’t be the tires. Do the valve stems go bad over time? What else am I missing. Hoping it’s just a silly fix. Thanks gentlemen.
     
    Logans2001, Apr 27, 2022
    #1
  2. Apr 27, 2022 at 11:57 AM
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    Wulf

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    Wulf no brain just damage

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    it could be a crack or deformation in the wheel or the valve stem. The tire shop should diagnose it for free if you tell them it has a slow leak.
     
    Wulf, Apr 27, 2022
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  3. Apr 27, 2022 at 11:57 AM
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    Marshall R

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    Marshall R Well-Known Member

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    You should get new valve stems with new tires. The problem may be the wheel, not the tires.
     
    Marshall R, Apr 27, 2022
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  4. Apr 27, 2022 at 11:58 AM
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    Black DOG Lila

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    Black DOG Lila Well-Known Member

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    New tires should get new valve stems.
    Ask to have the bead seatings deburred, cleaned and polished as well.
     
    Black DOG Lila, Apr 27, 2022
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    treyus30, Abeyancer and Wulf like this.
  5. Apr 27, 2022 at 11:59 AM
    #5
    Logans2001

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    Logans2001 [OP] What’s crackin’

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    Do the tires need to be removed for this or is this something I can do myself
     
    Logans2001, Apr 27, 2022
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  6. Apr 27, 2022 at 12:07 PM
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    Black DOG Lila

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    Black DOG Lila Well-Known Member

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    Tires have to come off rims to replace valve stems and clean bead surfaces
     
    Black DOG Lila, Apr 27, 2022
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  7. Apr 27, 2022 at 12:11 PM
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    glwood6

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    glwood6 Well-Known Member

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    New tires on old wheels, and the problem persists, even worse, I'd say wheels.
     
    glwood6, Apr 27, 2022
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  8. Apr 27, 2022 at 12:15 PM
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    Logans2001

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    Logans2001 [OP] What’s crackin’

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    Lovely. Now I have to find a shop that won’t mind working with wheel spacers. Thanks for the info.
     
    Logans2001, Apr 27, 2022
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  9. Apr 27, 2022 at 12:27 PM
    #9
    Logans2001

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    Logans2001 [OP] What’s crackin’

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    Discount tire said they can do all 4 for $20. That sound right? I was expecting more.
     
    Logans2001, Apr 27, 2022
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  10. Apr 27, 2022 at 12:29 PM
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    b_r_o

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    b_r_o Gnar doggy

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    Spray some soapy water on the valve core and look for bubbles. The little core can be easily swapped out

    Also the rubber seal at the base of the stem can leak. Parts stores should have a "TPMS service kit" that comes with the nut, washer, rubber grommet and new valve core.. usually just a few bucks
     
    b_r_o, Apr 27, 2022
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  11. Apr 27, 2022 at 12:30 PM
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    Wulf

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    Wulf no brain just damage

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    before you throw parts at it, tell them you have a slow leak and let them dunk it in their tank to identify the actual problem. They shouldn't charge you to diagnose it.

    but $5 ea sounds good for parts and labor
     
    Wulf, Apr 27, 2022
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  12. Apr 27, 2022 at 12:32 PM
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    LOLLY

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    LOLLY Well-Known Member

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    What @b_r_o said! I sprayed Windex on my valve and instantly saw bubbles when I had this issue
     
    LOLLY, Apr 27, 2022
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  13. Apr 27, 2022 at 12:35 PM
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    b_r_o

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    b_r_o Gnar doggy

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    Oops just realized I'm in the 1st gen section.. no tpms seals to replace. If the valve stem is leaking just replace it.

    Tire shop shouldn't even have to re-balance the tire, just pop the bead and sneak a new stem in there
     
    b_r_o, Apr 27, 2022
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  14. Apr 27, 2022 at 2:08 PM
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    Vann

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    Vann Well-Known Member

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    Vann, Apr 27, 2022
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    Logans2001[OP] likes this.
  15. Apr 27, 2022 at 2:54 PM
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    Logans2001

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    Logans2001 [OP] What’s crackin’

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    Just had discount tire do them for $20 and the mechanic said they did look pretty old so that’s a relief. My buddy’s shop was suppose to replace them when the tires went on but I guess they forgot. Will update if the problem persists. Thanks gents.
     
    Logans2001, Apr 27, 2022
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  16. Apr 30, 2022 at 9:13 AM
    #16
    Logans2001

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    Logans2001 [OP] What’s crackin’

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    Got back home yesterday to find my front right tire at 10 psi but the back left is holding fine now as well as the other two. They weren’t supposed to rotate them.
    The mystery continues…..
     
    Logans2001, Apr 30, 2022
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  17. Apr 30, 2022 at 9:17 AM
    #17
    Andy01DblCabTacoma

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    Andy01DblCabTacoma Well-Known Member

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    You might want to install a ring camera to catch the valve stem gnomes that are pranking you at night.
     
    Andy01DblCabTacoma, Apr 30, 2022
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  18. Apr 30, 2022 at 9:17 AM
    #18
    Wulf

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    Wulf no brain just damage

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    Did you get the premium air?
     
    Wulf, Apr 30, 2022
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  19. Apr 30, 2022 at 9:23 AM
    #19
    Logans2001

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    Logans2001 [OP] What’s crackin’

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    Well of course. Only the best.
     
    Logans2001, Apr 30, 2022
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  20. Apr 30, 2022 at 10:19 AM
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    Diablo169

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    Diablo169 ROKRAPR

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    Pretty sure 01’s did t have TPMS.
     
    Diablo169, Apr 30, 2022
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