Pressure Testing (Carbureted)

Disconnect fuel line from fuel tank at the engine compartment fuel filter. Connect a fuel pressure gauge to fuel line. Plug fuel filter. Remove the left side dash undercover and remove the fuel pump cut-off relay from the fuse box. See Fig 1 . Connect a jumper wire between terminals No. 1 and No. 2 in relay cavity at fuse box.
Turn ignition on until fuel pressure stabilizes on gauge. Turn ignition off. Gauge should indicate 1.3-2.1 psi (.09-.15 kg/cm² ). If pressure is less than specification, check for plugged rear fuel filter. If filter is not plugged, replace in-tank fuel pump.
If pressure is within specification, remove pressure gauge. Place fuel delivery line into an appropriate container. Turn ignition on and measure fuel delivery. Fuel pump should deliver at least 1.25 pints in 60 seconds. If fuel delivery does not meet specification, replace fuel pump.

Fig 1: Carbureted Fuel Pump Cut-Off Relay Terminal
Courtesy of AMERICAN HONDA MOTOR CO., INC.