Originally Posted by bigrigfixer

Check the drain *****. They might not be seated properly, or if they're the twist type, might not be closed.

There might be a leak in the compressor discharge line.

The governor might be bad. Or, you might need to put an unloader kit in the compressor.

Keep us updated.

Originally Posted by rbaker6336

Easy way to find air leaks is to charge the system with a separate compressor.It's offen hard to hear a leak with the engine running