THE PLT DEPARTED EL PASO, TX, AND FLEW TO DOUGLAS, AZ, WHERE THREE PAX BOARDED. THE PLT THEN FLEW TO A RANCH NEAR SEBOYETA, NM, AND LANDED ON A DIRT ROAD. AFTER CONDUCTING BUSINESS, THE PLT AND HIS PAX TOOK OFF FOR PAGOSA SPRINGS, CO. AS THE ACFT TURNED ON A X-WIND LEG, THE ENG QUIT. WHEN THE PLT LEVELED THE WINGS, THE ENG STARTED, THEN QUIT AGAIN. THE PLT ATTEMPTED TO MAKE A FORCED LANDING. DURING THE APPROACH, THE PLT ATTEMPTED TO AVOID AN ARROYO. THE ACFT STALLED AND CRASHED. THE PLT WAS KILLED BUT THE 3 PAX SURVIVED. POST-ACCIDENT EXAMINATION DISCLOSED TRAPPED FUEL BETWEEN THE FUEL CONTROLLER AND FUEL MANIFOLD. APRX ONE-HALF TANK OF FUEL WAS IN LEFT TANK. RT TANK WAS EMPTY. PLT WAS SEEN TO TURN FUEL SELECTOR FROM LEFT TANK TO RIGHT TANK. ALL FUEL LINES WERE SEVERED. THE ENG WAS LATER FUNCTIONALLY TESTED AND DEVELOPED FULL PWR.