To be a litle late for some reason this mornig and trying to go to work in a hurry (but still in good control, not speeding).
However, one of the rear tires delayed me which needed some air as i can feel that the car ran awkwardly. Stopping at one Gas station where the inflation device is free, and started to air the tires. I started from the other three which were over inflated (from pressure of 5.0 to 4.0), then take the last one. However, the inflator stopped working. I can see the pressure reading was 2.0 with that tire, but the device just refused to air it. I gave up quickly and went inside the shop to let the clerk know and left.
I arrived at another gas station and inserted one dollar to initiate the inflation machine. To my surprise, the same observation, the airing won't work. The reading be always 2.0 !!
I couldn't stand it, fortunately I sticked to it a little longer, and the reading becomes 3.0 when I checked it.
OMG, the previous one was not defected. I was simply not patient enough to wait for it doing its job.