73 hex =115 dec
8C hex = 140 dec
79 hex = 121 dec
According to End Tuning
115 Mass Air Flow Sensor Signal
140 Map Cooling Thermostat Activation
79 = Not listed at The End
This doc says for a 319i http://websunrise.org/manuals/auto/bmw/319.pdf
79 Camshaft Angle Pulse Generator
So you have 3 sensors that you could possibly unplug to see if it will at least run right, MAF, Cam Pos Sensor, Throttle position sensor.
Obviously check each one in turn, since with a single missing sensor it may revert to a 'safe' map.