Fuel Pump Delivery Flow
WARNING: This page is about a different car, the 1990 Saab 9000 and 1990 Saab 900. However, it is still accessible from the selected car via links, so may be relevant.
- 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 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 acceptable volume is .95 qts. (.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.