Tire pressure problems
Thread Starter
Burning Brakes
Joined: Apr 2002
Posts: 1,169
Likes: 0
From: SASKATOON SK
Tire pressure problems
on my 98 vette, the tire pressure at the dash reads 25psi but when manually checked i'm at 28 to 30. any reason why i would have such a large difference?
Rod
PS. the front left is where i have this problem!!!
Rod
PS. the front left is where i have this problem!!!
Advanced
Joined: Dec 2006
Posts: 75
Likes: 1
From: Rhode Island
R DEVIL is probably correct, the battery is weak but not the 12V one under the hood; the battery in the TPM sensor. Most OE suppliers of TPM systems suggest nominal life of 5-7years. This of course varies widely and is wholly dependent on driving habits; less miles driven equals longer life. When the wheel is not in motion the sensors "go to sleep" then wake when a threshold speed is reached, usually in the 10-12 mph range. Prove it to yourself, start the car cold then immediately try to read tire pressure. All zeros until threshold speed is met. Anyway, I have seen several sellers or TPM sensors that replace the battery only. Somehow they are able to "un-pot" the sensor then replace the battery. I have not used one of these however if you have an early C5, the TPMS can be pricely. BTW, I too have a '98. Hope this helps.
Le Mans Master
Joined: Jun 2006
Posts: 6,979
Likes: 31
From: Wichita KS
R DEVIL is probably correct, the battery is weak but not the 12V one under the hood; the battery in the TPM sensor. Most OE suppliers of TPM systems suggest nominal life of 5-7years. This of course varies widely and is wholly dependent on driving habits; less miles driven equals longer life. When the wheel is not in motion the sensors "go to sleep" then wake when a threshold speed is reached, usually in the 10-12 mph range. Prove it to yourself, start the car cold then immediately try to read tire pressure. All zeros until threshold speed is met. Anyway, I have seen several sellers or TPM sensors that replace the battery only. Somehow they are able to "un-pot" the sensor then replace the battery. I have not used one of these however if you have an early C5, the TPMS can be pricely. BTW, I too have a '98. Hope this helps.
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Advanced
Joined: Jun 2008
Posts: 65
Likes: 1
From: Ortonville Michigan
I had that problem when I first got my 98. Then I pumped the tires up from 28 lbs. to 34 lbs. and it went away. I think 28 is a little low. The guy I got it from said that the dealer told him 26 to 28 lbs and he always had trouble with the sensors. Plus I got a letter from Obama thanking me for increasing the tire pressure as per his instructions for saving fuel. It changed my life.
Instructor
Joined: Mar 2006
Posts: 155
Likes: 0
From: Martinsville Indiana
Drifting
Joined: May 2006
Posts: 1,616
Likes: 1
From: Minnesota
Each wheel has it's own sensor that is programmed to the car. So if they put new tires on and installed the wheel that used to be on the passenger front to the driver front your DIC will be reversed since the computer still thinks the wheels are in the same spot.
Reprogramming your tire sensors takes about 5 minutes and an old speaker magnet.
Reprogramming your tire sensors takes about 5 minutes and an old speaker magnet.
Instructor
Joined: Mar 2006
Posts: 155
Likes: 0
From: Martinsville Indiana
Each wheel has it's own sensor that is programmed to the car. So if they put new tires on and installed the wheel that used to be on the passenger front to the driver front your DIC will be reversed since the computer still thinks the wheels are in the same spot.
Reprogramming your tire sensors takes about 5 minutes and an old speaker magnet.
Reprogramming your tire sensors takes about 5 minutes and an old speaker magnet.