Residual Pressure & Internal Leak Testing
- Open valve on pressure gauge. Operate fuel pump for 30 seconds. Pressure can drop to a minimum of 38 psi (2.7 kg/cm2
) after 10 minutes. If pressure drops below specification, inspect fuel pump check valve and all fuel fittings for leakage.NOTE: Pressure and leak testing does not include checking cold start valve.
- If there are no leaks, check sensor plate clearance. If plate clearance is correct, replace diaphragm pressure regulator and repeat leak test. If pressure drop is not within specification, replace fuel distributor "O" rings.