Quote:
Originally Posted by movemetal17
...hey i was wondering about filling your tires with nitrogen. my tire stems have the green caps on them which im pretty sure means theres nitrogen in them...
i have a couple questions about it: 1) is putting nitrogen in something that you can do yourself or do you have to take it to a dealership? 2) is it ok to mix regular air with the nitrogen?
ever since it got cold here in bama my tpms light has been on but ive checked pressure on all four tires a couple times and both times all four have been atleast 35, usually 37. any help is appreciated...
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Sure, actually the stuff that we breath is comprised mostly of Nitrogen. By volume it's about 80%, the rest is mostly oxygen. And the other gases are present only in very small amounts. Oh, and then there is the water vapor.
To fill a tire with N (nitrogen) we need to vacate all of the air that is inside the tire, or are we really only concerned with the 20% that is O (oxygen), or maybe it's just the 1% water vapor that might be present that is giving us any trouble. Gotta watch that water vapor stuff ....
By the sounds of things, you may have a sensor that is not reading correctly, unfortunately figuring out which one it is may be difficult, or even impossible. If all four tires are set to 35 PSI (cold) using the same tire pressure guage, and the TPMS light comes on that would suggest a failure in the TPMS system. One of the 4 sensors, or maybe it's the TPMS computer ?
Sorry, I am not really helping but I sure do understand your situation. The real problem is the presence of TPMS but near as I can tell, only the gov. can do anything about that. And since it's their brainchild, it seems rather unlikely that they will want to abandon it, no matter how BAD it really is.
I think, but do not know for sure that when new sensors are installed, the vehicle TPMS computer must be trained to listen for each of the 4 new sensors that have just been installed. That one-at-a-time training procedure might expose one of your sensors as being "bad", maybe ... I will be learning more about this in the spring when the four new rims, sensors and tires get installed on my truck. I don't know if the output from each of the 4 sensors can be read and thus determine that one unit is failing, or non-responsive.
Man I sure hate this stuff. Seatbelts ain't got nuttin on TPMS.
From what I understand about the sensors, if one is failing we might be stuck with having to replace all four to fix things, can anybody clarify this ???