Lately I'm having a pressure problem with one of my tires. Periodically it comes down to 1.9-2.0 and the TP monitor suggests to inflate the tire to 2.4. When I do that, the pressure keeps holding for several days, but then again comes down to the same 1.9-2.0 level. What can be causing this?
Technical Low pressure in one of the tires
- Thread starter Geolith
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Technical Low pressure in one of the tires
A leaky valve or a slow puncture would be my guess. Your TPMS system works differently to the European system, but I can't think of another cause
A leaky valve or a slow puncture would cause the pressure to go down constantly over the time, but it holds exactly at the same lowered pressure for days, never going below it. There must be something else going on here.
If it's loosing air it must be leaking somewhere
It could be that the high pressure is causing the leak and when it drop below a certain threshold it doesn't have enough pressure to leak out any more
Good point.
I'm hoping you are actually checking the pressure with a separate guage, not just believing the sensor readings.
My Fabia has sensor warnings, but I had the wheels swapped with a lower model, so I have steels. (They'll tolerate the learners kebing them) So the sensors are on a different car, the steels do not have them. Occasionally the system will get upset, telling me I have lost some pressure, but cannot tell me which tyre. Probably because I have no sensors. Will get the system disabled when serviced.
A learner smacked a kerb with the AA Fiesta, tore a hole in the sidewall. It took more than a minute for the monitoring system to tell me. We of course already knew.
Recently I had one tyre go soft gently. It was leaking at the inner bead, where a balance weight was fitted. The cheap weight clamp was pushing the tyre off its seat slightly.
Take the wheel off. Lie it flat, and pour a little water around the valve where it enters the wheel, also some on the valve with the cap off, and some all around the wheel rim. Wait and see if any bubbles appear. Pump it above normal pressure.
Turn it over and check the other rim.
My Fabia has sensor warnings, but I had the wheels swapped with a lower model, so I have steels. (They'll tolerate the learners kebing them) So the sensors are on a different car, the steels do not have them. Occasionally the system will get upset, telling me I have lost some pressure, but cannot tell me which tyre. Probably because I have no sensors. Will get the system disabled when serviced.
A learner smacked a kerb with the AA Fiesta, tore a hole in the sidewall. It took more than a minute for the monitoring system to tell me. We of course already knew.
Recently I had one tyre go soft gently. It was leaking at the inner bead, where a balance weight was fitted. The cheap weight clamp was pushing the tyre off its seat slightly.
Take the wheel off. Lie it flat, and pour a little water around the valve where it enters the wheel, also some on the valve with the cap off, and some all around the wheel rim. Wait and see if any bubbles appear. Pump it above normal pressure.
Turn it over and check the other rim.
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Of course. I'm adding air with a small 12V compressor and it has its own physical gauge. Gotta say my TPMS readings have never lied so far.
I had an incident a couple of months ago, it was dark and I failed to see a piece of the road was broken off, went straight into it and popped the tire. The sensor informed me in a split second. I don't know about other monitoring systems, but this one seems to be trustworthy.
That's a result.
Small stuff can hide well.
There's always the problem that whenever you check a tyre, it is sitting on a part of it, which can hide such debris. Doing driver trainig recently with a supermarket, all tyres looked good, pressures ok, but when it was moved from its spot, a shiny screw appeared.
A bit tedious jacking up each corner and turning the wheel to check. How often might anyone actually do that?
