often the schreader valve inside the valve stem is loose, a special insert wrench is needed to tighten.
Gas tank leak repair at Canadian tire or replace it,replacement is the best choice if you're keeping the car.
Put an inner tube in the tire.
Fix it.
You have to determine the source of the leak then decide on how to fix it.
Some causes of a slow leak are a faulty valve stem, a small puncture in the tire or a poor seal at the rim. This is a job that is best left for professionals to fix. Bring the car to your local tire store to have the problem diagnosed. They will be able to determine the problem and come up with the safest solution.
Probably not. It may be worth the five or six dollars to try.
You cant
TPMS stands for Tire Pressure Monitor System. If you have a low tire on some models this will show via a picture of your vehicle and which tire is low. If you had a slow leak on a tire and used fix a flat then you probably messed up the TPMS and that is why you have that light on your instrument cluster.
You have to replace it. They are designed to leak when they are going bad.
If air is leaking out, obviously the pressure will decrease to nothing. Find the leak and fix it.
fix the vacuum leak
Get a new car