Warning High Pressure
Thread Starter
Burning Brakes
Joined: Sep 2013
Posts: 969
Likes: 141
From: Staten island NY
Warning High Pressure
Hour ride 90 degrees F. Rear tires went to 42psi and showed high tire pressure warning had to pull over and bleed a few psi from each tire. Never saw this before. Michelin run flats AS3
Safety Car
Joined: Jun 2013
Posts: 4,309
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From: FW/d Texas
Add any air recently ? I had same issues several years ago with my GY RF's. I'd added some air using a digital gauge to check and a few days got the high pressure warning. Checked with trusty old style slide bar gauge and found they were high, the digital gauge was FUBAR big time. Chucked the digital and only use the 'old style' now - no more problems ! 
Team Owner
Joined: Jul 2016
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From: The Steel City, Colorful Colorado
Winner 2020 C7 of the Year - Modified
When I had a major brand tire store put new tires on my 03' the same thing happened as I left their lot after the install. Guess I should have looked while it was still parked there, but it turns out that the tech was reading the suggested PSI on my tires themselves instead of following the recommendation on the inside of my door and decided 42 PSI was a good number. My DIC freaked out I came back and schooled them about the 30 PSI Cold printed on the inside of the driver side door, but am not confident that they actually cared.
I have mine set at 30 PSI Cold, but notice that they typically jump up as high as 36 PSI when I'm driving around.
I have mine set at 30 PSI Cold, but notice that they typically jump up as high as 36 PSI when I'm driving around.
Pro
Joined: Apr 2017
Posts: 590
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From: Hanover Maryland
Hotter temps + hot tires will raise your PSI by a good amount. 10PSI increase not unheard of. 1 PSI per 10 degrees F is the general rule of thumb. Add more for the tire heating up as you roll down the road, it's not negligible!
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Tires must have been inflated well past the 30PSI information on the door placard before you started your drive. Per the owners manual the warning you received would be expected at 42PSI. Most tires will pick up 4 to 6 lbs when hot. So likely the tires started over 36PSI cold......
using the 1 psi to 10 degree rule, you tires would have gone up 120 degrees 
to achieve the 42 psi reading if they were at the correct pressure of 30 psi.
Last edited by knewblewkorvette; May 19, 2017 at 04:22 PM.
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Tires must have been inflated well past the 30PSI information on the door placard before you started your drive. Per the owners manual the warning you received would be expected at 42PSI. Most tires will pick up 4 to 6 lbs when hot. So likely the tires started over 36PSI cold......
You had to have way too much air pressure in the tires to begin with.
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