When I got my truck a couple years ago the air would cycle on/off quickly. I had the system checked and re-charged and that lasted about 1 year before it started quick cycling again. Earlier there appeared to be something like oil or ?? leaking around the lines coming off the compressor. The compressor was pretty loud too when it operated. Sounded like my garage air compressor . I recently changed the waterpump and had to move the compressor to r&r the belt. Now the air doesnt work at all. I assume it may have a leak at the compressor line and the pressure has leaked down too much although I didnt "hear" any leak when I moved the compressor. Whats the options? Should I just r&r the compressor etc. or take it into a shop and let them figure it out?