FUEL PUMP I nspection l, Flush pump by immersing it in a fuel bath and operating rocker arm a number of times. 2. Drain fuel from fuel pump. Then block off the inlet port and check that pump arm does not move. SEFEEIA 3. Remove your finger from the inlet port and listen fur a suction sound which will confirm that a sufficient suction was produced. 4 Block off outlet port and once again operate _; the rocker arm. After air pressure has been built up, confirm that the presure remains for two or three seconds after. 565st 5. Put a finger over the outlet port and again build up pressure in the pump. Then submerse the pump in a fuel bath and check for air leaks.