TPMS Accuracy

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Old Jul 13, 2007 | 06:55 PM
  #1  
lland's Avatar
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Burning Brakes
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From: Wellington, FL
TPMS Accuracy

According to my TPMS, my tires (PAX) were all off by a few PSI so I figured I'd bring them up to spec (30 PSI Rear, 32 PSI Front). Using my trusty Craftsman compressor and handy Accutire digital guage, I inflated them to exatly where they should be. I then started the car and watched as the TPMS indicator settled in (took about 5 seconds). They ended up with 31 Rear and 33 Front, exactly 1 PSI higher than the Accutire. Not bad at all.

LL
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Old Jul 14, 2007 | 07:18 AM
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larrynimmo's Avatar
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From: Cordova, MD
according to my electronic tester, my pressures are exact. I now find it interesting when the tires are hot that the pressures rise almost 4psi.
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Old Jul 14, 2007 | 08:51 AM
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From: Orlando, FLA
Originally Posted by lland
According to my TPMS, my tires (PAX) were all off by a few PSI so I figured I'd bring them up to spec (30 PSI Rear, 32 PSI Front). Using my trusty Craftsman compressor and handy Accutire digital guage, I inflated them to exatly where they should be. I then started the car and watched as the TPMS indicator settled in (took about 5 seconds). They ended up with 31 Rear and 33 Front, exactly 1 PSI higher than the Accutire. Not bad at all.

LL
LOL. I'd say your weird if I didn't do the same thing

I'm starting to wish the TPMS only warned you when it went outside a certain range (like my other car). I find that with it displaying the exact pressures I'm in the garage every weekend with the pump! Must be an OCD thing

Poll: How many guys have spend way more time then necessary trying to get all four tires to register the same value? I want honesty here
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Old Jul 14, 2007 | 10:09 AM
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From: NYC | Chofu-shi
I run a staggered pressure setup, about 35 up front and 33 is in the rear. The system is very accurate vs my mechanical gauge +/- 1 psi. The rise in pressure when hot is totally normal as the air expands.
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Old Jul 14, 2007 | 10:34 AM
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dwboston's Avatar
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From: Boston, MA
Originally Posted by SpicyMikey
LOL. I'd say your weird if I didn't do the same thing

I'm starting to wish the TPMS only warned you when it went outside a certain range (like my other car). I find that with it displaying the exact pressures I'm in the garage every weekend with the pump! Must be an OCD thing

Poll: How many guys have spend way more time then necessary trying to get all four tires to register the same value? I want honesty here
Like Touge, I run 35 front and 33 rear. The manual suggests 32 and 30. I think you want higher PSI up front due to all of the weight from the engine and SH-AWD components so the nose of the car doesn't dip down.
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Old Jul 14, 2007 | 11:59 AM
  #6  
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From: Tampa, Florida
Red face

I too find it acurrate, and use a digitial to check when I wash the car. Glad I was not 1st to admit it!

I run 35 front and 34 rear. Hmmmm, maybe I should drop a bit for some cush? On the other hand, I have been geeting really good mileage at this pressure. It's odd that I get better mpg in summer with AC on MAX 24/7. Must be the summer grade fuel and the extra psi?
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Old Jul 14, 2007 | 02:33 PM
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rmesola's Avatar
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running 32 and 30 as per specs... they're accurate to within 1/2psi based on my digital hand held gauge... assuming my gauge is accurate...
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Old Jul 14, 2007 | 11:29 PM
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I too am running according to what is suggested. I find that the ride quality suffers when I don't have the right psi on all tires. And besides, when driving under a hot weather, the psi goes up. Anyway, the pressure monitor is a bit off compared to what i get if i measure the pressure manually. As long as i'm within what is suggested i'm okay.
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Old Jul 15, 2007 | 01:22 PM
  #9  
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Mine is about 36 for fronts and 35 for rears. On a hot summer day after some driving, i've seen it hit 41psi. But it's still under the max psi stated on the mxm4's... right? I like the higher psi for fuel economy.
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Old Jul 15, 2007 | 03:09 PM
  #10  
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I have 38 front and 36 rear with 19" wheels and i love it
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Old Jul 15, 2007 | 04:15 PM
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rmesola's Avatar
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not sure higher PSI equals better fuel economy... up to a certain limit, yes, but beyond that you lose traction at the sides in theory... you'll know this when the center of the tire wears out before the sides

anybody figure out what the best PSI is for fuel economy?
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Old Oct 17, 2021 | 04:29 PM
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beyond 1000's Avatar
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GUILTY AS CHARGED!
Got myself a quality digital guage and now go by that. What the TPMS says, I don't care cause I'm not PMSing about this any more.
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