TPMS question
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Instructor
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From: Virginia Beach VA
TPMS question
I purchased new wheels and tires for my '00 along with new TPMS sensors. The tire installer recommended keeping the pressure around 40-43 psi. Since the PCM is programmed to read a lower psi due to factory EMT tires being in the 30s, is there any way possible to change/re-program the system to read at a higher psi to eliminate the alarm??
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Go with the recomended tire pressure that the manufacturer suggest for the car which is 30 psi cold. The manufacturer of your car knows more about it than the monkey at the tire store.
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Don't know why tire installers recommend 40/43lbs..whew, that's a lot 
. A little like Jrosie, except for me, I run 28PSI (cold) Summer, and 30PSI(cold) Winter. In the Summer, I notice when I run 27 miles to my daughters house, around 1300/1400hrs, usually at 80mph on the Interstate, outside temps 92/98+*, my 28PSI Summer pressure has increased to 34PSI once I get to her house, yep, I actually tested PSI with a digital guage, before and after, I wanted to see the difference. 
. A little like Jrosie, except for me, I run 28PSI (cold) Summer, and 30PSI(cold) Winter. In the Summer, I notice when I run 27 miles to my daughters house, around 1300/1400hrs, usually at 80mph on the Interstate, outside temps 92/98+*, my 28PSI Summer pressure has increased to 34PSI once I get to her house, yep, I actually tested PSI with a digital guage, before and after, I wanted to see the difference.
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Instructor
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From: Virginia Beach VA
Thanks guys! So the psi listed on the sidewall is just the max the tire can handle? By running in the lows 30s there won't be any adverse wear issues then? Sounds good...going to lower it now. Thanks again.
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Can't believe someone who sets themselves up in business as an expert can give customers such bad advice.
At 43 psi it would be like driving a streetcar.
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The tire monkey doesn't know what he's talking about. 30 lb cold usually warms up to 32 lb hot when driving the car. That's where I have set mine based on all the previous threads and feedback on this subject.
Seems to promote the most even tire wear, etc.
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The technicians took psi increase after warming up and a multitude of other things in account and recommended 30 psi cold. Not 30 psi when warmed up. Its up to individuals to deviate, but the belief that you have to put 28 psi in to be at the recommended 30 is false. If you have dropped the run flats, and done other weight reducing components and overall reduction to the vehicle, it is then different and an individual can put in less psi if needed. For a stock car put 30 psi cold in.
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I run mine at 28 cold to avoid centerline wear. My Michelin AS ZPs lasted 25k miles but the rears had more wear in the center and, if anything I ran them low on pressure.
Can't believe someone who sets themselves up in business as an expert can give customers such bad advice. At 43 psi it would be like driving a streetcar.
Can't believe someone who sets themselves up in business as an expert can give customers such bad advice.
At 43 psi it would be like driving a streetcar. I run my hankooks at 28 psi as well. I ran 30 psi for the first couple of thousand miles and found my centers to be wearing faster than the sides too, so now I run 28.Your tire installer is an idiot. These are not LT rated truck tires with a high load rating. Stick to 28-30.
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I run my hankooks at 28 psi as well. I ran 30 psi for the first couple of thousand miles and found my centers to be wearing faster than the sides too, so now I run 28.Your tire installer is an idiot. These are not LT rated truck tires with a high load rating. Stick to 28-30.
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Just keep an eye on them for the first couple of thousand miles, and make note what pressure you're running and how the wear looks! The weight of the car (including the wheels) and the alignment is going to have the most direct effect on the treadwear. 28psi has worked best for me with the V12 Evos.
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Just keep an eye on them for the first couple of thousand miles, and make note what pressure you're running and how the wear looks! The weight of the car (including the wheels) and the alignment is going to have the most direct effect on the treadwear. 28psi has worked best for me with the V12 Evos.
I installed a set of new Koni FSD shocks earlier this spring. As a result, the car was much more firmly planted than it was with the OEM shocks. So much that my near end-of-life Yokohama tires suddenly felt like run-flats due to the new shocks. I could not believe how much more road I felt under me. The car rides great with the new Hankook rubber, however the old Yokohamas felt pretty good as well until I swapped out the shocks and realized how worn down they had become.
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Do not keep 40-43 psi in the tires, that is way too much air pressure.
The factory specs, printed on a lable inside the driver's door, says 30 psi cold. That is the number I would go with.
The factory specs, printed on a lable inside the driver's door, says 30 psi cold. That is the number I would go with.
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Instructor
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From: Virginia Beach VA
Thanks for all the input. So, here's another question...I have another vehicle that also calls for 30 psi. I changed from the stock 17" wheels to 20". Tires are 255/35/20. Being the dramatic change is 30 what I should still go with? I'm hoping to learn this tire science.
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Thanks for all the input. So, here's another question...I have another vehicle that also calls for 30 psi. I changed from the stock 17" wheels to 20". Tires are 255/35/20. Being the dramatic change is 30 what I should still go with? I'm hoping to learn this tire science.