CrazyDave_merged Posted October 25, 2007 Report Share Posted October 25, 2007 It's colder than a witches nipple here in Houston. All four of my pressure indicators show a little red. Got the dreaded "Tire Pressure Low" warning on my info screen. Thought I may have picked up a nail. Time to add a few pounds to compensate. Then it will warm up and all four BF's will explode. Link to comment Share on other sites More sharing options...
Webba Posted October 25, 2007 Report Share Posted October 25, 2007 Cold in Houston=below 60? I know what you mean though. I have had to add air to mine a few times the past few weeks. I need some again in one tire. It has been cooler here after record warmth last week and we may have flurries this weekend. (snow showers for you that have never heard of it) I wanted to drive her in today but we had rain showers and the roads were still wet. I am figuring on only 1 more week until she gets put to bed for winter Link to comment Share on other sites More sharing options...
clark17357 Posted October 25, 2007 Report Share Posted October 25, 2007 Cold in Houston=below 60? I know what you mean though. I have had to add air to mine a few times the past few weeks. I need some again in one tire. It has been cooler here after record warmth last week and we may have flurries this weekend. (snow showers for you that have never heard of it) I wanted to drive her in today but we had rain showers and the roads were still wet. I am figuring on only 1 more week until she gets put to bed for winter You know, here in San Diego we have had plenty to keep us busy but snow is not part of it. At the risk of revealing that I was born and raised in San Diego (by two Minnesota farm kids), how many Forum members have to put their cars away for the winter months? Sorry to hijack this topic a bit but with 90 degree temperatures and firestorms, one's muse turns to cooler things, like snow. Jim Link to comment Share on other sites More sharing options...
ShelbyGT#3658 Posted October 25, 2007 Report Share Posted October 25, 2007 I live in Ohio and as soon as it gets cold the low tire indicator on my Mountaineer comes on. It's normal for a tire to loose 1 to 2 lbs of air a month so maybe when it warms up they might be at the right pressure. Link to comment Share on other sites More sharing options...
stump_breaker Posted October 25, 2007 Report Share Posted October 25, 2007 So, what is the recommended pressure (without having my manual handy)? 32 psi? Link to comment Share on other sites More sharing options...
LuLu Posted October 25, 2007 Report Share Posted October 25, 2007 So, what is the recommended pressure (without having my manual handy)? 32 psi? Don't know what the book says, but I know a littlt bit about BFG tires. I suggest 35 PSI for maximum performance from these tires. If I had Pirelli's, I would suggest 38-40 PSI, based on my past experience. Factory fills are nortoriously low, so the "customer test drive" is softer. But, this affects tire performance and adhesion to the pavement too. Correct inflation/PSI will telegraph road noise and feedback to the driver, but performance is the priority over comfort, right? The weather here has been really weird lately, swinging back and forth from 90's to 60's overnight. Just last week, my low pressure alarm went off and I checked the PSI. 25-27 PSI, and I bumped it back up to 35 PSI. I feel more cracks in the road, but improved control balances this out. Somewhere in the back of my head, I recall an equasion of "10 degrees = 1 PSI", but I can't say it's a "rule". But, if the factory set the PSI to 30 for a softer ride in Vegas, and the car is in Chicago now, the numbers seem about right. Link to comment Share on other sites More sharing options...
SoDakMac Posted October 25, 2007 Report Share Posted October 25, 2007 Cold in Houston? We do not consider it cold in South Dakota until it drops below zero. I have had difficulty with tire pressure sensors on my cars as well (not sure why they have not included that factor in their software). But, I had the Mustang’s tires inflated by Nitrofil (nitrogen gas), which is unaffected by ambient temperature as well as road temperature. My local Ford dealer peddles the product. It appears to solve the problem but my baby will be parked all winter anyway. Link to comment Share on other sites More sharing options...
ShelbyCobra826 Posted October 25, 2007 Report Share Posted October 25, 2007 You know, here in San Diego we have had plenty to keep us busy but snow is not part of it. At the risk of revealing that I was born and raised in San Diego (by two Minnesota farm kids), how many Forum members have to put their cars away for the winter months? Sorry to hijack this topic a bit but with 90 degree temperatures and firestorms, one's muse turns to cooler things, like snow. Jim Put it away for the winter? Are you kidding me? Nothing spells FUN like a cold, dense charge of air hitting the engine mixed with cold pavement and colder tires! It almost takes the fun out of summer driving... Link to comment Share on other sites More sharing options...
SGT#507 Posted October 25, 2007 Report Share Posted October 25, 2007 My "tire pressure low" light also came on this week---as soon as it dropped into the 60s here in Austin, TX. Link to comment Share on other sites More sharing options...
SGT ShuttleGuy Posted October 25, 2007 Report Share Posted October 25, 2007 Cold in Houston? We do not consider it cold in South Dakota until it drops below zero. I have had difficulty with tire pressure sensors on my cars as well (not sure why they have not included that factor in their software). But, I had the Mustang’s tires inflated by Nitrofil (nitrogen gas), which is unaffected by ambient temperature as well as road temperature. My local Ford dealer peddles the product. It appears to solve the problem but my baby will be parked all winter anyway. Not sure which physics book says nitrogen's not affected by temperature. All contained gasses will change pressure just due to temperature changes. Tires filled with 92% or 96% Nitrogen just don't leak as much as tires filled with 78% nitrogen (air) due to size of molecules. In any case I, too, have had the sensor come on just within the last two days. Houston is getting cold, but it can't be that bad. Must be tire gremlins.... Link to comment Share on other sites More sharing options...
Mustang Lover Posted October 25, 2007 Report Share Posted October 25, 2007 Must be the week for it, mine went off too with this little cool snap we are having , I knew I should have checked the tire pressure when I got it from the dealer it was down to 22 Psi ( didn't look low though ) put it back to 32 Psi and all is well . On a side note that had to be hurting my gas milegage too. Link to comment Share on other sites More sharing options...
stwsam Posted October 25, 2007 Report Share Posted October 25, 2007 It is a conspiracy, they are satellite controlled! Link to comment Share on other sites More sharing options...
STLShelby Posted October 25, 2007 Report Share Posted October 25, 2007 Wonder if there's a way to go into the computer and disable it. Never had it on a car before and don't need it. I always check tire pressure one a month. It's a pain in the butt if you ask me. Link to comment Share on other sites More sharing options...
CrazyDave_merged Posted October 26, 2007 Author Report Share Posted October 26, 2007 My little pressure sensors (on stems) all went from green to red in one day. I look at them each time I get in. At least on the drivers side. Each tire had between 28-29 psi, pumped them all up to 33. That's 32 with 1 to leak on. If it gets warmer (like in the 80's) I will check them again. Link to comment Share on other sites More sharing options...
Webba Posted October 26, 2007 Report Share Posted October 26, 2007 I put air in mine finally yesterday afternoo. All were good except my drivers side rear one. When I put the tire guage on the stem the needle didnt even budge! I will have to keep an eye out for a leak. Link to comment Share on other sites More sharing options...
tko211 Posted October 26, 2007 Report Share Posted October 26, 2007 Funny! Mine did the same thing to me last week. It got down to the low 40's in Utah and all the sudden I lost about 10 lbs of pressure in each tire on the car and I got the low pressure warning. I freaked out and drove it to the dealership. they laughed at me and filled the tires to fix it. I took off the traction control and burnned the tires as I left the dealership as a thanks for the help! Everyone cheered at the service center. :D Link to comment Share on other sites More sharing options...
mccoystudio_merged Posted October 27, 2007 Report Share Posted October 27, 2007 Not sure which physics book says nitrogen's not affected by temperature. All contained gasses will change pressure just due to temperature changes. Tires filled with 92% or 96% Nitrogen just don't leak as much as tires filled with 78% nitrogen (air) due to size of molecules. In any case I, too, have had the sensor come on just within the last two days. Houston is getting cold, but it can't be that bad. Must be tire gremlins.... Molecular Nitrogen is actually smaller than oxygen. Nitrogen is 14 and Oxygen is 16 on the periodic table. In fact out atmosphere is about 70 percent nitrogen anyway. My wife is a research scientist and she calls advertising ad copy on the size idea. :D Link to comment Share on other sites More sharing options...
frankieboo69 Posted October 27, 2007 Report Share Posted October 27, 2007 Not sure which physics book says nitrogen's not affected by temperature. All contained gasses will change pressure just due to temperature changes. Tires filled with 92% or 96% Nitrogen just don't leak as much as tires filled with 78% nitrogen (air) due to size of molecules. In any case I, too, have had the sensor come on just within the last two days. Houston is getting cold, but it can't be that bad. Must be tire gremlins.... My sensor came on also and when i took it to ford it had 1 tire 1/2 lb low and that was enough to trigger the sensor with the weather change !!!!!!!! B) Link to comment Share on other sites More sharing options...
sdear Posted October 27, 2007 Report Share Posted October 27, 2007 Cold in Houston? We do not consider it cold in South Dakota until it drops below zero. I have had difficulty with tire pressure sensors on my cars as well (not sure why they have not included that factor in their software). But, I had the Mustang’s tires inflated by Nitrofil (nitrogen gas), which is unaffected by ambient temperature as well as road temperature. My local Ford dealer peddles the product. It appears to solve the problem but my baby will be parked all winter anyway. I have had the nitrogen fill since I bought the car over 6 months ago. They highly recommended living in florida with the hot temps . Have only had to add nitro to one tire...3 lbs...when a sensor came on. The other 3 tires have stayed constant for over 6 months. They say it's ideal for temp change climates.....has been great for me so far. They also say you get less tire wear. It was 20 dollars to fill all 4, and that includes lifetime refills. ONly downside is if you do get a low tire, you have to fill it at the dealer. They did tell me if I have to use reg air, do so, but bring it in asap and refill. Link to comment Share on other sites More sharing options...
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