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Losing tire pressure

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Old Sep 22, 2011 | 10:30 AM
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Default Losing tire pressure

Hey guys I've noticed lately my back left tire seems to loose air pressure over the course of a week or two I refill it and it drives fine. Any suggestions on what it could be? I'm using the stock tires and size

Thanks!
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Old Sep 22, 2011 | 10:57 AM
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Take it a tire place, have them pull it off the car and check for leaks.
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Old Sep 22, 2011 | 11:01 AM
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Originally Posted by chaase
Take it a tire place, have them pull it off the car and check for leaks.

A hole in the tire, leak at the rim/tire interface, TPMS nut torqued to proper value, bad TPMS o-ring or valve stem leak. Would suggest using a tub of water to dunk the tire in (or at least a portion of it at a time) or take it to a tire shop.
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Old Sep 22, 2011 | 11:03 AM
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Originally Posted by chaase
Take it a tire place, have them pull it off the car and check for leaks.
OOPS, that's called common sense...................
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Old Sep 22, 2011 | 11:23 PM
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or it could just be it is getting cooler outside.

PV=nRt

tire pressure drops when the ambient temperature does.
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Old Sep 22, 2011 | 11:42 PM
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Originally Posted by rws.1
or it could just be it is getting cooler outside.

PV=nRt

tire pressure drops when the ambient temperature does.
I guess the back left tire could be farther north than the other three and the temperature way up there is lower, so it only affects the one tire.
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Old Sep 22, 2011 | 11:58 PM
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If they're thin spoke wheels, they might have a crack that's leaking.
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Old Sep 23, 2011 | 12:26 AM
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Originally Posted by Mew2
Any suggestions on what it could be?
Seriously?
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Old Sep 23, 2011 | 12:43 AM
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My 99 has the same problem (same tire) I am pretty sure its the tpms sensor o ring or seat. It never leaked prior to having the tire shop rebuild them when I bought new tires. Not consistant either, sometimes I'll lose 10 lbs in 2 weeks. Sometimes none!! I just havent taken the time to take it in to Discount tire
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Old Sep 23, 2011 | 08:45 AM
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I had the same problem with my 98 after I changed tires. The problem went away when I bought new rims and had all four tires put on the rims. I think it was fixed by the remounting but there are a lot of variables as mentioned above. You could try the easy ones first which is tighten the tpms nut first.
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