Fuel Pump Flow
- Turn ignition off. Disconnect fuel return line at pressure regulator. Connect a section of test hose to return line at pressure regulator. Place other end of test hose in 2-quart (approximate) graduated container.
- Activate fuel pump by turning ignition on. Run fuel pump for 30 seconds. Check volume of fuel flow and fuel pressure drop. Minimum acceptable volume is 1.9 pts. (.9L); maximum allowed fuel pressure drop is 1.4-2.8 psi (0.1-0.2 kg/cm2 ). If fuel volume or pressure drop does not meet specification, replace fuel pressure regulator.