Justin O'Brien

This may be the wrong forum so i appoligize if it is. I have an air compressor that has a 20 gallon tank and a 5.5 hp honda gas motor on it with a cast iron pump. It had been sitting for a little bit, i cleaned it and cleaned the carberator,out new gas in it and started it up. It has a couple issues with it. One is when its on it runs so hard it littlerally shakes the whole compressor around speratically almost like the RPMS are too high. 2 problem is, the idle on it wont work. When running it will fill the tank up passed the max psi of the tank. It never goes to idle just stays running hard unless i manuelly pull the choke on it. Any one knows the problem and how to fix this. Thankyou