Perhaps you could get your local tire shop or the Ford dealership to check the valve stem to see if it's loose. You could also check this yourself by putting some soap water or spit on the end of the valve stem (after you take the cover off), if it starts bubbling, then air is coming out of the valve stem. Because you are losing such low amounts of air, you might have to look closely for a while to see any bubbles.
Good luck, I know this kind of problem is very annoying (happened with my first car '79 Olds), esspecially in the winter time!
[quote author=Nr9 link=topic=80212.msg1480434#msg1480434 date=1181659351]
one of my tires loses a lb of pressure every week. what could be the cause?
Hi Nr9. :wavey: It could be a puncture in the tread (with whatever caused the puncture, a nail, screw, etc., still in the tread) causing a slow leak. Could be the aforementioned leaky valve, or a wheel problem.
My bet would be a puncture with a slow leak. If it is, it can most likely be patched for $10-$20.
Take it to the Dealer or your local tire store, like Fusion4u said.
A forum community dedicated to Ford Fusion and all Ford vehicle owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance for the Focus, Fiesta, Taurus, Mustang and more!