Fuel Pressure: Testing and Inspection

FUEL PUMP FLOW TEST
1. On diesel engine models, connect a suitable hose from diesel fuel filter feed line into a suitable container.
2. On gasoline fuel injection models, relieve fuel pump pressure, then disconnect fuel feed line and install a suitable hose on line. Place other end of hose into suitable container
3. On diesel engines, turn ignition switch to the Run position.
4. On gasoline engines, apply battery voltage to fuel pump test terminal.
5. On all models, fuel pump should supply 1/2 pint or more within 15 seconds.
6. If flow is below minimum, check for fuel restriction. If no restrictions are noted, check pump pressure.

PRESSURE TEST, GASOLINE ENGINE MODELS
For fuel pump pressure tests, refer to Fuel Injection section under appropriate Fuel Injection System for procedure.