Pressure Test

Remove air cleaner, and plug thermal vacuum port on throttle body. Remove fuel pump fuse from fuse block in passenger compartment. Start engine. Engine will run until present fuel supply is exhausted. Replace fuse.
Remove steel fuel pipe between TBI and fuel filter. Install Pipe and Adaptor Assemblies (J-29658-02) onto Gauge Assembly (J-29658). Install gauge between TBI unit and fuel filter. Start vehicle, and note pressure reading.
Reinstall steel fuel line, using new "O" rings if necessary. Start vehicle, check for leaks and turn ignition off. Remove plug covering thermal vacuum port on throttle body. Install air cleaner.
Disconnect fuel line at TBI unit. Install low pressure gauge to line. Start engine and note pressure reading. Fuel pump pressure should be 4-6 psi.
If pressure reading is correct, pump is okay. If pressure reading is not okay, check for restricted fuel filter, lines and hoses. If all are okay, check power relay.