Noises During Shifting problems of the 2002 Nissan Sentra

Intermittently while driving at any speed and shifting any gear the vehicle stalled. The dealership inspected the vehicle 10 times on different occasions, and could not duplicate or correct the problem. There were numerous probles with engine stalling, the maf had to be replace numerous times, the check engine and the reverse light did not work properly. (the wiring harness also repeated intermittent problems) the engine would stall when the clutch was depressed and when in neutral idling and when shifting the gears. The front speaker/tweeters made cracking noises. The cooling fan would come on when not activated.