Air compressor prognostic system

A system, comprising:

• a detector that is configured to detect a rotational speed of a crankshaft included in a compressor that provides compressed air and that includes a crankcase breather valve coupled with the crankshaft;
• and
• a controller having a processor and a memory, wherein the controller is in communication with the detector and configured to determine a change in resistance relating to the crankcase breather valve based at least in part on the rotational speed of the crankshaft that is detected, wherein the controller is configured to determine a reduction in the rotational speed of the crankshaft, the reduction is below a one per revolution pulsation in an A/C signature, wherein the controller is configured to determine the change in resistance based on the determined reduction in the rotational speed of the crankshaft, wherein the controller is configured to respond to the detected reduction in the rotational speed by generating a signal indicative of at least one of a fault, a failure, or an impending failure associated with the crankcase breather valve;
• wherein the controller is configured to adjust at least one of a duty cycle of the compressor, a starting torque capability of the compressor, or an unloaded run time of the compressor based at least in part on the signal.