What was found
ELECTRIC FUEL WAS CHANGED OUT DUE TO TIME IN SERVICE, A NEW PUMP WAS INSTALLED AND AIRCRAFT TEST RAN, WHEN ELECTRIC PUMP WAS TURNED OFF, FUEL PRESSURE DROPPED TO 0 AND ENGINE DIED, FUEL PUMP WAS NOT ALLOWING ANY FUEL TO PASS THRU IT WHEN OFF AND STARVING THE ENGINE. INSTALLED ANOTHER ELECTRIC FUEL PUMP AND PROBLEM WAS CORRECTED