I'm looking for ideas on why the air compressor will not rev up to the 22 cfm setting and 26cfm settings.
It runs at 17cfm and I can turn the starter switch to from auto to run and get to 26cfm. (mine is the older style that only goes to 26 and not 31 cfm).
MA471156M....2/2011.
For those of you not familiar with the AirPak, the compressor switch has 4 settings: off, 17 cfm, 22cfm, 26 cfm.
17 cfm comes on at idle, 22 cfm position revs the engine to a higher rpm, and 26 cfm position is wide open.
It took me and a friend 2 hrs. to bolt the AirPak in service truck with hidden long threaded bolts and and lock nuts so I don't want to remove it if I can fix it my self.
You must remember all I can do is poke with my finger, wiggle things, and tap with a hammer.
So any ideas will be appreciated.

Thank you,
Bob Miller