the code that comes out is 19 crankshaft pos sen. the sensor has been replaced,same code. the engine runs good but once the a/c is turned on the engine goes balistic stumbling missing then eventially shuts down. i tried it at 40 mph and the engine quit. turned a/c off and restarted engine. i have also replaced the TPS. i disconnected the vacuum line to the a/c switch but this did nothing so not a vacuum problem. could it be that the a/c compressor is getting ready to seize up? this is a 1995 grand am se 2.3 engine. thanks john.
