Fuel Pump Delivery Flow Test
- 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 graduated container of about 2 quarts.
- Activate fuel pump by turning ignition on. Run fuel pump for 30 seconds. Check volume of fuel flow and fuel pressure drop. Minimum allowed volume is .95 quart (.9 l), and maximum allowed fuel pressure drop is 1.4-2.8 psi (.1-.2 kg/cm2 ). If fuel volume or pressure drop does not meet specification, replace fuel pressure regulator.