I saw on of my Prius tires fairly low, so I put my handy dandy P737DCN 18v Power Inflator on it. fluctuated wildly between 40 - 70 psi. I tried it again a few days later - same thing. And again the next day. The other tires look normal. What's going on?
You talking about the gauge on the machine I no use or read that until I stop pump . Schrader maybe sticking gunned up from slime like antics!?
Your Ryobi is a fairly O.K. tool, but in my experience, most of the $50 and under inflators are somewhat questionable as to measuring actual PSI in tire. Also, your question is not really clear. Not sure what you are asking. Tire goes low after a day? Could be loose valve stem or could be a tire leak. If pressure drops everyday....something is wrong. Sometimes just tough to get an accurate tire PSI READING from the small compressors. Stop by a tire store, ask them to check pressure.
