would a defective egr valve cause your engine to quit at highway speeds? on 1991 Pontiac Grand Am

i was driving home from work on the parkway going 65mph when the engine lost power and quit.when i tried restarting it would just crank and sometimes backfire thru the carburetor.i got the car home did some checking,the engine will start without the egr but the rpms soar.

Asked by for the 1991 Pontiac Grand Am