1993 suzuki keeps stalling..

:disappoin My suzuki have been stalling, i changed the spark plugs and wires, rotor cap and button, an new mass air flow meter. After changing the meter it ran for an couple of hours and then shut off again. the engine light comes on and the od light starts flash and it want allow me to give it any gas. im in the process of changing the ecu in it. could there be any other problem that could be causing this problem... please help thanks...!! ...:disappoin