High Tire Pressure?
Thread Starter
Racer
Joined: Mar 2009
Posts: 301
Likes: 0
From: USA
High Tire Pressure?
I finally got my new 09 Cpe home and racked up a few hundred miles yesterday! 
Installed some of my Goodies too.
Top flight detachable front license plate assembly, along with their 430hp badges on the hood, and later the GM mud flaps.
I hit the road and after approx fiteen minutes of driving I started getting high pressure alerts through the DI display.
High Pressure Alerts, alternating to all four tires?
I just went out to the garage this am, and I am on the money at 30psi Cold inflation.
Is there an adjustment for this?
Thanks!
Installed some of my Goodies too.
Top flight detachable front license plate assembly, along with their 430hp badges on the hood, and later the GM mud flaps.
I hit the road and after approx fiteen minutes of driving I started getting high pressure alerts through the DI display.
High Pressure Alerts, alternating to all four tires?
I just went out to the garage this am, and I am on the money at 30psi Cold inflation.
Is there an adjustment for this?
Thanks!
Thread Starter
Racer
Joined: Mar 2009
Posts: 301
Likes: 0
From: USA
I checked the tires a few days ago when cold and all four were exactly at 30psi with my hand held.
I have a analog dial gauge, dead nuts at 30psi after sitting all night.
This am I went for a ride and before I took off the DI system showed front at rear tire pressures cold at 37psi after sitting all night?
Something is up....
The car has only 200 miles on it, and my hand held gauge shows 30psi cold as it's supposed to be.
So either the car sensor is off at 37psi cold or I and the delivery prep guys both have bad hand gauges and the tires are over inflated.
I have a analog dial gauge, dead nuts at 30psi after sitting all night.
This am I went for a ride and before I took off the DI system showed front at rear tire pressures cold at 37psi after sitting all night?
Something is up....
The car has only 200 miles on it, and my hand held gauge shows 30psi cold as it's supposed to be.
So either the car sensor is off at 37psi cold or I and the delivery prep guys both have bad hand gauges and the tires are over inflated.
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
Since it is front and back, it is not the wheel sensors. Take it back to the dealer. I'm guessing the BCM is on steroids.
Elmer
Elmer
Thread Starter
Racer
Joined: Mar 2009
Posts: 301
Likes: 0
From: USA
Doesn't the BCM regulate several other items as well?
Maybe I can see if something else is going stupid.
This 09 it still pretty much new to me in comparison to my 02.
Thread Starter
Racer
Joined: Mar 2009
Posts: 301
Likes: 0
From: USA
The car has been sitting in my garage for close to four hours and it's about 75 degrees outside.
I checked all four tires with my gauge and they average 36psi per tire.
According to the manual 3-4 hours sitting is Cold tire pressure.
So, I brought them all down to 30psi.
Now,
I'm throwing darts here;
Cold tire pressure..,
Un-driven etc, would I need to set my tire pressure any different if the outside temperature is hovering around freezing - 32 and the car has been sitting for a couple of days?
The above is when I took my previous 30psi readings.......
I'm guessing the tire engineers run their specs at the 70 degree ambient air average......?
I checked all four tires with my gauge and they average 36psi per tire.
According to the manual 3-4 hours sitting is Cold tire pressure.
So, I brought them all down to 30psi.
Now,
I'm throwing darts here;
Cold tire pressure..,
Un-driven etc, would I need to set my tire pressure any different if the outside temperature is hovering around freezing - 32 and the car has been sitting for a couple of days?
The above is when I took my previous 30psi readings.......
I'm guessing the tire engineers run their specs at the 70 degree ambient air average......?
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Thread Starter
Racer
Joined: Mar 2009
Posts: 301
Likes: 0
From: USA
Great, I hope everything is COOL.
I'm really not a service dept kind of guy.
The last time I brought one of my Corvettes in for service I found a burger king wrapper in it when I picked it up.
Tomorrow it is going in for a Windshield replacement and I am debating wether I should throw some Military blankets across the entire cockpit in anticapation of four 300lb guerillas jumping in and out of the car all morning .
I'm really not a service dept kind of guy.
The last time I brought one of my Corvettes in for service I found a burger king wrapper in it when I picked it up.
Tomorrow it is going in for a Windshield replacement and I am debating wether I should throw some Military blankets across the entire cockpit in anticapation of four 300lb guerillas jumping in and out of the car all morning .
Team Owner
Joined: Jun 2005
Posts: 46,295
Likes: 2,596
From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
That's interesting. If I read this correctly, you're saying on the same day you got a 30 lb. reading in the am, after 3-4 hour cooldown at 70 degrees outside, your tire pressures were 36.
So, the difference betw. first thing in the morning and 4 hours of cooldown is 6 lbs.? Hmm, interesting.
Walt says high pressure alerts at 44 which makes me wonder: from the 36 after cooldown, your tires went up an added 8 lbs. in 70 degree running?
Walt/Op, doesn't that seem a lot?
So, the difference betw. first thing in the morning and 4 hours of cooldown is 6 lbs.? Hmm, interesting.
Walt says high pressure alerts at 44 which makes me wonder: from the 36 after cooldown, your tires went up an added 8 lbs. in 70 degree running?
Walt/Op, doesn't that seem a lot?
Thread Starter
Racer
Joined: Mar 2009
Posts: 301
Likes: 0
From: USA
That's interesting. If I read this correctly, you're saying on the same day you got a 30 lb. reading in the am, after 3-4 hour cooldown at 70 degrees outside, your tire pressures were 36.
So, the difference betw. first thing in the morning and 4 hours of cooldown is 6 lbs.? Hmm, interesting.
Walt says high pressure alerts at 44 which makes me wonder: from the 36 after cooldown, your tires went up an added 8 lbs. in 70 degree running?
Walt/Op, doesn't that seem a lot?
So, the difference betw. first thing in the morning and 4 hours of cooldown is 6 lbs.? Hmm, interesting.
Walt says high pressure alerts at 44 which makes me wonder: from the 36 after cooldown, your tires went up an added 8 lbs. in 70 degree running?
Walt/Op, doesn't that seem a lot?
The car had been sitting for a couple of days after being brought home from the dealer when I took that reading.
I took the car to the dealer this am for the windshield replacement and dropped it off.
25 or so miles, and I didn't get any high pressure warnings as I had been previously.
Checking the DIC showed 34psi all the way around climbing to about 36 -37 pounds during the trip.
It must be my handheld.
Just going to have to order another toy for the tool box
Team Owner
Joined: Jun 2005
Posts: 46,295
Likes: 2,596
From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
The 30psi reading wasn't taken the same day, it was taken approx two weeks ago.
The car had been sitting for a couple of days after being brought home from the dealer when I took that reading.
I took the car to the dealer this am for the windshield replacement and dropped it off.
25 or so miles, and I didn't get any high pressure warnings as I had been previously.
Checking the DIC showed 34psi all the way around climbing to about 36 -37 pounds during the trip.
It must be my handheld.
Just going to have to order another toy for the tool box
The car had been sitting for a couple of days after being brought home from the dealer when I took that reading.
I took the car to the dealer this am for the windshield replacement and dropped it off.
25 or so miles, and I didn't get any high pressure warnings as I had been previously.
Checking the DIC showed 34psi all the way around climbing to about 36 -37 pounds during the trip.
It must be my handheld.
Just going to have to order another toy for the tool box
More new toys is a good thing.
