Hi, after fixing my dodgy solenoid 3 weeks ago, suspension has been lovely !! Then saturday morning, jump in start her up and hear a very distressed sounding compressor !! Aagghh. Checked it all through The compressor runs but after a while the little intake hose changes from sucking to blowing. Cant figure out what the solenoid pilot valve does??? Is this a by-pass for start up?? i think the piston ring, which looks like its made of carbon, is worn out and passing when the pressure becomes to great i.e. the car gets higher. Has any one had a similer problem/solution. any one know who makes the compressor??