I have a front tire that was losing air. About 4 pounds a day. Inspect the tire and find nothing in it. Took the valve core out and went to put in some slime until I could get around to replace the tires. Could not get any slime to go in. Made a HUGE mess on the back side of the rim. Gave up and went to add air back in. Could not get the tire to air up. Air compressor set at 110psi to no avail. Do I have a bad tpms? I've been adding air for the last week so don't know what's going on. Any ideas?