TPMS Accuracy
Thread Starter
Racer
Joined: Nov 2007
Posts: 288
Likes: 0
From: Genoa Nevada
TPMS Accuracy
I just installed a set of replacement tires on my 05 Coupe. The OE Supercar's were "done" at 14K miles. I replaced them with GY's F1 GS-2 and I enjoy the difference in the ride, much smoother and significantly quieter.
I checked the tire pressure the following morning, after the install and it was 30lbs all the way around. The TPMS readout on the way home after the install was 30lbs as well.
This morning, two days later, the TPMS read 27lbs front and rear. The tire gauges I have, one mechanical the other digital, report 30lbs
Is it possible that the TPMS is out of calibration or that my car is pissed that I changed to a different model GY tire
I checked the tire pressure the following morning, after the install and it was 30lbs all the way around. The TPMS readout on the way home after the install was 30lbs as well.
This morning, two days later, the TPMS read 27lbs front and rear. The tire gauges I have, one mechanical the other digital, report 30lbs
Is it possible that the TPMS is out of calibration or that my car is pissed that I changed to a different model GY tire
Drifting
Joined: Jun 2006
Posts: 1,992
Likes: 0
From: Bay Area Ca.
I just installed a set of replacement tires on my 05 Coupe. The OE Supercar's were "done" at 14K miles. I replaced them with GY's F1 GS-2 and I enjoy the difference in the ride, much smoother and significantly quieter.
I checked the tire pressure the following morning, after the install and it was 30lbs all the way around. The TPMS readout on the way home after the install was 30lbs as well.
This morning, two days later, the TPMS read 27lbs front and rear. The tire gauges I have, one mechanical the other digital, report 30lbs Is it possible that the TPMS is out of calibration or that my car is pissed that I changed to a different model GY tire
I checked the tire pressure the following morning, after the install and it was 30lbs all the way around. The TPMS readout on the way home after the install was 30lbs as well.
This morning, two days later, the TPMS read 27lbs front and rear. The tire gauges I have, one mechanical the other digital, report 30lbs
Is it possible that the TPMS is out of calibration or that my car is pissed that I changed to a different model GY tire
Le Mans Master
Joined: Feb 2008
Posts: 5,634
Likes: 1,185
From: Lake Worth Beach, Florida
I have four or five tire pressure gages and they all read differently. I just chose to use the one that comes as close to the TPMS reading as possible. That solved my problem. I just try to see an equal amount of pressure on the tires at all times, works pretty close.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 807
From: West coast CA
I just installed a set of replacement tires on my 05 Coupe. The OE Supercar's were "done" at 14K miles. I replaced them with GY's F1 GS-2 and I enjoy the difference in the ride, much smoother and significantly quieter.
I checked the tire pressure the following morning, after the install and it was 30lbs all the way around. The TPMS readout on the way home after the install was 30lbs as well.
This morning, two days later, the TPMS read 27lbs front and rear. The tire gauges I have, one mechanical the other digital, report 30lbs Is it possible that the TPMS is out of calibration or that my car is pissed that I changed to a different model GY tire
I checked the tire pressure the following morning, after the install and it was 30lbs all the way around. The TPMS readout on the way home after the install was 30lbs as well.
This morning, two days later, the TPMS read 27lbs front and rear. The tire gauges I have, one mechanical the other digital, report 30lbs
Is it possible that the TPMS is out of calibration or that my car is pissed that I changed to a different model GY tire
Thread Starter
Racer
Joined: Nov 2007
Posts: 288
Likes: 0
From: Genoa Nevada
Possible scenario: the tires were warmer the first morning, accounting for the 3-pound difference in TPMS readings (when I drive to work in the morning, my right tires read higher pressure than the left tires because the sun is shining on the right side of the car). The difference between TPMS and your handheld gauges could be due to high elevation, because the TPMS sensors aren't referenced to ambient pressure. What's the elevation where you live?
Drifting
Joined: Apr 2007
Posts: 1,768
Likes: 19
From: ABQ NM
At ABQ, at 5000', my TPMS consistently reads 2.5-3 lbs less than several, supposedly accurate, handheld digital gauges.
Tire pressure (relative not absolute) rules of thumb I recall are 10 degree F = 1 psi and 2000' = 1 psi.
Tire pressure (relative not absolute) rules of thumb I recall are 10 degree F = 1 psi and 2000' = 1 psi.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 807
From: West coast CA
That explains everything. Under those circumstances, if the readings weren't what they were, something would be wrong.
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