"hillrat" (hillrat)
11/04/2020 at 19:35 • Filed to: tires, TPMS
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"hillrat" (hillrat)
11/04/2020 at 19:35 • Filed to: tires, TPMS | 0
| 9 |
I always say that there’s nothing about my Hyundai I don’t like and that’s a lie. There’s one thing that is sub-standard IMHO and that’s the TPMS. My old car (2008 Torrent) had a TPMS that told you the pressure of each individual tire but this Hyundai does not. When you have low tire pressure, it shits up a message about low tire pressure that can’t be cancelled and doesn’t tell you which tire is low or how low it is.
It wouldn’t be a problem except for whenever the overnight temperature drops below about 45 degrees, one tire loses a bit of pressure down to about 28/ 29 psi and the threshold for throwing a low tire pressure error is 30 psi. If I don’t do anything the tire will stay at that level for however long I don’t fill it and ride/drive just fine. If I fill it and it’s a day like today (daytime high of high 60's and down to the 40's overnight) the tire will be low in the morning again.
What causes this? Is this a bad bead on the tire or a problem with the TPMS valve?
GLiddy
> hillrat
11/04/2020 at 19:58 |
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I’d start with looking for a leak with soapy water, then get a Schrader valve tool and make sure it’s seated properly. If that doesn’t reveal the problem, take it to a tire shop and have them look at it. Maybe remounting the tire may fix it. Be sure to look at the wheel carefully to see if it’s damaged when the tire is off it.
SBA Thanks You For All The Fish
> hillrat
11/04/2020 at 19:58 |
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You could have a slow leak... valve stem, debris on bead, tire issue, even cracked rim.
I wouldn’t condemn the TPMS system until you’ve confirmed, with a very accurate gauge, that you aren’t actually losing pressure.
ttyymmnn
> hillrat
11/04/2020 at 20:04 |
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Are you using the new cover sheet? It was covered in the memo.
bob and john
> hillrat
11/04/2020 at 20:07 |
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so, it does depend on HOW they do the TPMS.
some companies / cars have the TPMS set up so that they dont use sensors in the wheels, but rather use the ABS tone rings and see if any tire is spinning faster or slow, and send a TPMS signal based on that.
DipodomysDeserti
> hillrat
11/04/2020 at 20:19 |
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Pressure and temperature are directly proportional at a constant volume (like in a tire) . Decreasing temp will decrease the pressure in your tires. Amonton’s law. Just fill the tire up a bit more above the threshold pressure.
subexpression
> hillrat
11/04/2020 at 20:20 |
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That sounds like a bead leak or other slow leak, not a TPMS problem . I have seen a similar problem before where a tire would only lose air if it was higher than a certain pressure and then hold steady once it got down to a certain point .
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hillrat
> DipodomysDeserti
11/05/2020 at 09:04 |
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I’ve tried that and it didn’t work. Pressure drops to 28/29 psi and then stops dropping no matter what happens.
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hillrat
> GLiddy
11/05/2020 at 09:06 |
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Maybe remounting the tire may fix it.
I got new meats about 6 months ago and I was hoping that getting rid of my old baloney skin tires would fix the problem and it didn’t.
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DipodomysDeserti
> hillrat
11/05/2020 at 09:17 |
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Weird. Magic tires.