Webba Posted September 21, 2007 Report Share Posted September 21, 2007 Well its that time of year again up here in Maine when it gets colder and suddenly without warning you get up and all your tires have 21 psi in them. My low tire pressure warnign has been on for a few days so I finally broke out the air hose and filled them up at work this morning. I put in 34 psi...figuriing it'll go down again soon....and when I started her up the warning didnt go away. So my question is do you need to drive so many miles to reset or am I still low? I know I can hit reset and get rid of the warning temporarily but I want to make sure I am putting in the correct PSI and I dont have any other issues. I read a thread on here from last spring listing the SAI recommendation at 32 PSI so I am thinking I am OK. Any info would be appreciated. Link to comment Share on other sites More sharing options...
stump_breaker Posted September 21, 2007 Report Share Posted September 21, 2007 Well its that time of year again up here in Maine when it gets colder and suddenly without warning you get up and all your tires have 21 psi in them. My low tire pressure warnign has been on for a few days so I finally broke out the air hose and filled them up at work this morning. I put in 34 psi...figuriing it'll go down again soon....and when I started her up the warning didnt go away. So my question is do you need to drive so many miles to reset or am I still low? I know I can hit reset and get rid of the warning temporarily but I want to make sure I am putting in the correct PSI and I dont have any other issues. I read a thread on here from last spring listing the SAI recommendation at 32 PSI so I am thinking I am OK. Any info would be appreciated. I don't have my manual with me since I'm at work but I believe you have to reset the computer somehow. Have you tried hitting reset on your dash gauges? You mean you haven't drained your summer air and switched to winter air yet? And you call yourself a Shelby lover..... for shame! :D Link to comment Share on other sites More sharing options...
SoDakMac Posted September 21, 2007 Report Share Posted September 21, 2007 I had cold weather issues with a tire pressure monitoring system in another vehicle but with the Shelby the dealer replaced the air in the tires with nitrogen. Since I waited so long for the car they threw in the nitrogen tire system so I figured, why not. The nitrogen filled tires will retain their pressure regardless of ambient air temperature and will (supposedly) not lose pressure over the winter months in storage. Plus, they told me you do not have the moisture issue that comes with filling tires with air. They also have a road side assistance program but it sort of mirrors the Ford program so that is not of any real consequence in my situation. I guess time will tell if it really makes a difference. The cost is not that bad – I think around $39.00 for the four tires (no spare tire issues here). Link to comment Share on other sites More sharing options...
MattInDetroit Posted September 21, 2007 Report Share Posted September 21, 2007 Mine just reset when I put in the recommended psi on the tire. I will say that the TPS is like an idiot light. When it goes off, you are already WAY WAY to low. When the weather is the way it is you should get a really good tire pressure gauge and check weekly at least. Don't go by how they look etc., if the TPS goes off it's bad. Link to comment Share on other sites More sharing options...
ShelbyGT/SC Posted September 21, 2007 Report Share Posted September 21, 2007 Mine has been on since day one. My dealer couldn't figure it out as they were thinking I had a short somewhere. My tire pressure has been fine. Need to bring it back in October. Link to comment Share on other sites More sharing options...
goakley1 Posted September 21, 2007 Report Share Posted September 21, 2007 Had and issue with a nail in the tire and the place I took it ruined the TPM sensor on the rim. They had to get me a new one and put it on. The key is, the sensor is 180 degrees away from the valve stem and that the system needs to be reset by either Ford or a dealer. There is a combination of ignition switch on-offs and then the magnet gets place over the tires in a sequence. Your horn will beep when all this is done right... As for the low tire pressure, I believe its set to warn you when you lose 10% of the air in the setting - as stated above. Once you put the proper air in, the light will go out automatically... Gary Link to comment Share on other sites More sharing options...
shelbydream1 Posted September 22, 2007 Report Share Posted September 22, 2007 My last expedition's TPS light did exactly what you are describing. Once the air was put in it didn't immediately go out, but once you got a couple miles up the road it would reset itself once the ignition was turned off. Link to comment Share on other sites More sharing options...
ilmor Posted September 22, 2007 Report Share Posted September 22, 2007 During the winter I find that you need to increase your pressures about 2 psi or, during the colder days, the <bleep> warning light will come on. I hate this tpms stuff...there's just too much crap on cars today as a result of stupid and lazy people. Link to comment Share on other sites More sharing options...
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