tire pressure on the lil computer

now shows F 47
35

R 35
45

whats up with that

one day ago it was F 37
37

and one day later it jump from 37 to 47 ?



what is the best pressure u should have on the tire ?

do i just go fill them up my self or take it in the tire place...

 

look by the drivers side door jamb, it says 35psi cold. Just go to a gas station and fill them.

 

That digital psi is not very reliable! Mine seems to be closer than yours, off at time by +/-3psi. Manually check it periodically the old fashion way.

 

Was one side in the bright sun all day? I've seen that bump up the PSI by a couple pounds.

Are you using an accurate tire pressure gauge when you are filling them. Those cheap pencil style gauges and the ones built into the gas-station air pumps are notoriously inaccurate. That can account for the widely varying tire pressures.

The TPMS sensors are accurate to ±1 psi. As you drive around, the tires heat and can easily raise the pressure 3 or 4 PSI (with the stock Potenzas). Plus you have the sun to contend with. Combine all of those and you see why the pressures can read way off.

The best thing to do is measure it in the morning before driving with a good, accurate dial-type pressure gauge. I set mine at 34 psi and can drive around for weeks and check the monitors and the pressure is never abouve 37 psi and all four read the same.

 

so

is 47 in the front bad ?

i remember somthing about

keeping all 4 on 37

and mine apears F 47
35

 

Yes is "bad", 47 in the front is pretty high. You want them all around 35 psi, assuming that you have the stock wheels & tires. An extremely high pressure like that can cause it to ride hard and rough, unusual wear, risk of blowout.

 

oh i have 19 rims

and michelin tires

yea cuz one day it show 35 then one day its 47

freaking me out

what should i do to make it go back ?

 

Check your tire pressure manually and then lower it if necessary. Check it at least 2 hours after driving, and preferably in the shade / garage. If it's off, adjust it. And use a good gauge when checking, I'm getting the impression you used a cheap $.99 Dollar Store special.

 

You didn't answer the question of whether one side of the car was sitting in the hot sun or not. That might explain it, but that's still an aweful big jump in PSI. First thing you should do is check each tire with a quality pressure guage to see if your TPS are reading acurately, then adjust all tires to 35psi cold (do it first thing in the morning when there has been no sun on the car). As stated above, throughtout the day and with driving, the pressures will rise a bit and can be a little uneven, but they shouldn't have gone up that much.

 

sorry about the question

it was at night and my car is always inside

and yea i use the gas station thing to check my pressure the rear was on

40 somthing ( i think

im gonna go test it agian but with my own stuff

ill be right back

 

If you filled up the tires at a gas station and used the crappy gauge they have tied to the hose, that's likely your problem; the gauge was ****, you overfilled a couple of tires and you see the accurate readings on your TPS. Invest in a good gauge and always use it when checking your tires. I'm surprised you didn't mention a differerence in how the car drove; I'd think you'd notice it with a couple tires overfilled that much...

 

yea i just went and checked

the front is around 45 46

and the back is stil on 35 36

the tires max psi is 50 front 51 rear

the rear pressure is 45 both

front is around 40

 

yea i over filld on the rear

what the differerence was the car went faster -.- speeds up alot better

 

Max pressure on the tires means nothing; you go by the recommended pressure for the car on the inside door jamb sticker. All tires should be 35 PSI cold pressure. Some like slightly different pressures depending on tires and driving style, but you can't go wrong with 35 asll around and is the safest bet for best driving and even wear on the street.

 

yea i over filld on the rear ( i think

what the differerence was the car went faster -.- speeds up alot better

and it was a chevron gas station ( dont know does it mak a diff or not lol )

 

Yes, overfilling the rear will make the tires harder and balloon a bit, decreasing contact patch and rolling resistance. Traction will also decrease, you'll have a harder ride and the tires will wear out in the center much faster b/c they are overfilled.

 

yea i might have to let som out

in order to make it normal

thanks for everything man

 

No prob. Filling tires at the gas station is fine (though not as accurate as doing it at home b/c the tires will already be warm); just use your own gauge and know what pressure you should have. On the TPS computer, you should see 37-38 psi while driving around with the tires warm and 35 when you first start driving in the morning. Oh, and trust a good gauge over the TPS readout; it'll be more accurate.

 

yea ill do that

and what does it mean on the gauge

F 00 <-- does that mean left or right
00 <-- is this the rears ? or its just the left and right thing


then is this the Rears ?


R 00
00

 

You have to be moving (> 20 mph) for the TPS to register. The transmitters in the wheels only switch on during driving.

I too have 19" with Michelin PS2s. I've been running about 34 psi as 35, 36 psi seems too hard. The PS2s don't heat up when driving like the Potenzas so that is definitely not a problem. You've got the pressure set way too high, let some air out.