On Thu, 02 Jul 2009 22:20:41 -0400, Gene
wrote:

On Thu, 02 Jul 2009 19:50:17 -0400, John...same as yesterday.
wrote:

The local Toyota place will fill all the tires with nitrogen for $30.
Is it worth it? Thoughts?

It makes some sense if you have aluminum wheels. Otherwise, it just
isn't worth it.......

Didn't make a damn bit of difference with the aluminum trailer rims
and tires.

The beads still leak after a couple of dunkings in salt water.

"Gene" wrote in message
...

Bummer..... I just thought of something... it may be worth the
nitrogen to protect those TMPS sensors...
--


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

"Eisboch" wrote in message
...

"Gene" wrote in message
...

Bummer..... I just thought of something... it may be worth the
nitrogen to protect those TMPS sensors...
--


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.

"D.Duck" wrote in message
...

"Eisboch" wrote in message
...

"Gene" wrote in message
...

Bummer..... I just thought of something... it may be worth the
nitrogen to protect those TMPS sensors...
--


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

"Eisboch" wrote in message
news

"D.Duck" wrote in message
...

"Eisboch" wrote in message
...

"Gene" wrote in message
...

Bummer..... I just thought of something... it may be worth the
nitrogen to protect those TMPS sensors...
--


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

"D.Duck" wrote in message
...

"Eisboch" wrote in message
news

"D.Duck" wrote in message
...

"Eisboch" wrote in message
...

"Gene" wrote in message
...

Bummer..... I just thought of something... it may be worth the
nitrogen to protect those TMPS sensors...
--


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

"Eisboch" wrote in message
...

"D.Duck" wrote in message
...

"Eisboch" wrote in message
news

"D.Duck" wrote in message
...

"Eisboch" wrote in message
...

"Gene" wrote in message
...

Bummer..... I just thought of something... it may be worth the
nitrogen to protect those TMPS sensors...
--


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)

"Gene" wrote in message
...


http://www.tireindustry.org/features/TPMS.asp
--



My daughter just paid big bucks to pass the MA safety inspection because one
of her tire pressure sensors was bad and showed up as a error code in her
soccer mom, Chrysler mini-van. (I call it her Egg-Mobile).

The MA state inspection is notoriously tough. Everything that the vehicle
was equipped with from the factory must work. If you have a car with a
fancier trim that includes additional lights, side markers or reflectors and
one doesn't work or is broken, it flunks, even though the same exact vehicle
in more vanilla form that doesn't have the extra lights, etc. will pass.

They did, however, get rid of emissions testing by running the car on a
dynamometer and measuring the exhaust gases. Now they just plug into the
car's computer and look for any error codes. Cars built before 2005 are
now exempt from emissions testing.

This really ****ed off a bunch of state authorized and licensed inspection
stations who paid big bucks for the installation of dynamometers in their
inspection bays. They are now tearing them out.

Eisboch