This
is not an uncommon problem on any vehicle. The A/C compressor is trying
to lock up. This can be caused by several different issues. It can be
the electric fans are not cooling the condenser causing a higher than
acceptable head pressure and causing the compressor to lock up. Also,
there are times when idle air control valves go bad and do not adjust
the idle of the engine to compensate for the pull the compressor has on
the engine.
Gerald Wheelus
General Manager, Edgewood Parts
Edgewood, Texas