OK, I thought because the left cylinder is empty , vnailer makes air noise every time when I put vnail in the moulding . Also if I pull the handle up ( release air handle on top ) it's constantly releasing the air . Never happened before .And when I release the pedal to let clamp out of the moulding it makes air noise and then goes out . Those are new recent symptoms and when I saw empty cylinder I thought "this is it "... but you are saying that left cylinder should be empty.
I just put empty cylinder back and turned on compressor. So my consern is: when I release knob ( see photo ) it's constantly releasing air . When I put vnail in its also make psss ( air ) and then insert vnail , and when I release pedal to release the clamp , clamp has delay releasing - like thinking and then with psss (air ) releasing ...
it start to happen about month ago ...something is wrong but I'm totally lost . Thank you for your time and help. Love to call you to explain better.