"Eisboch" wrote in message
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"D.Duck" wrote in message
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"Eisboch" wrote in message
news

"D.Duck" wrote in message
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"Eisboch" wrote in message
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"Gene" wrote in message
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Bummer..... I just thought of something... it may be worth the
nitrogen to protect those TMPS sensors...
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Most of the TMPS systems don't really measure tire pressure.
The system has speed sensors on each wheel and measures the rotation
time of each tire compared to the others. If a tire is low, it's
number of rotations for a given speed, compared to the other tires
will increase. That's what triggers the low pressure warning.

It's a natural add-on capability brought about by anti-lock braking
systems (which require the speed sensors).

So, air or nitrogen means diddily.

Eisboch

What about the sensors that readout PSI and not just the *low* warning.
I have two Buick Lucernes and the newest actually reads out the PSI for
each tire, the older gives a low warning without telling which tire is
actually low. The older system is the one that I understand measured
wheel rotation.

I was unaware of that. Learn something new everyday. It is my
understanding however that most of the tire pressure monitoring systems
are of the type I described.

Eisboch

If i recall correctly the senors that measure PSI cost $300~400 to
replace


A tire pressure gauge is a couple of bucks at Auto Zone.

Eisboch

Ever try to read tire pressure at 70 MPH? 8)