Lr Tire Pressure
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Originally Posted by Paras
Actually, I just found that you have to drive the car around for like five minutes before the pressure reading adjusts...
I once read -but never confirmed- that there is a centrifugal-force switch inside the (newer model) sensors that activates it - only when the wheel is spinning; this to save battery life. Once parked, the BCM/PCM simply remembers the last reported pressures from the sensors. Until you drive the car again - the DIC may not see the updated pressures.
Drifting
Joined: Feb 2004
Posts: 1,829
Likes: 45
From: Las Vegas Nevada
Originally Posted by charlene
Those sensors can drive you crazy i have a compressor in the garage and i always check the tires on the vette and the gage will read 30psi on all the tires but the dic will read differently one might read 30 another 29 so i don't think the sensors are perfect i usually go by my gage..........Charlene
Instructor
Joined: Aug 2003
Posts: 175
Likes: 0
From: Miami Lakes FL
Originally Posted by Wisdom
As a matter of fact - I took my car into a local Clear Lake chevy dealership in October for warranty work. Ever since the car came back I seemed to lose maybe 1.25 lbs per day from one of the rear tires. The dealership had no business working in the tire area, so it had to be something else. So every chance I had I was on the ground looking at the tire for the suspect nail. Yesterday I finally had my tires replaced with Nitto 555's from Discount Tire. There was no nail in my problem tire. Today my rear Nitto's pressure was lower than yesterday's - so I finally woke up and used a 12mm wrench to tighten the valve stem. My problem tire's valve stem (aka pressure sensor) was looser than it should have been. I suspect that tomorrow morning that tire will have the same pressure as the others. I don't know how the sensor would have gotten loose all of a sudden in conjunction with the dealership visit. But you may want to check the valve stem to make sure it's tightened. There's a rubber o-ring or some sort of seal on them and I don't know if there's a torque value. But you should be able to tell if your problem one is looser than a good one.
- Wisdom
- Wisdom
