WOULD THE SPEED SENSOR CAUSE THE CAR NOT TO START AND SHUT OFF WHILE DRIVING?

Yes it wants to see engine speed to inform the computer the engine is "turning over". Check the crank angle sensor and wiring using the tests Parts Guy has outlined. If more information is needed there is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online