Before testing the fuel pump, always check the fuel filter for clogs and/or the fuel lines for kinks or blockages. This will require a pressure gauge and a graduated drain container.
1. Turn the ignition off. Remove the screws securing the under-dash fuse box to the bracket. Remove the fuel cut-off relay from the rear of the fuse box and rotate the box so that the relay mount is visible.
2. Connect the two leftmost contacts on the relay mount with a jumper. On the Prelude, these contacts are connected to black and yellow wires, and on the Accord, they are marked with numbers 1 and 2.
3. Disconnect the fuel line at the fuel filter in the engine compartment and connect a pressure gauge.
4. Turn the ignition key to the "ON" position; when the pressure on the pressure gauge stabilizes, return the key to the "OFF" position.
5. The pressure should be 16.5-21.4 kPa for Accord and 13.8-20.7 kPa for Prelude. If the pressure is below the minimum, the pump must be replaced.
6. Disconnect the pressure gauge and route the line into a drain container. Have an assistant turn the ignition key to the "ON" position for 60 seconds, then turn the ignition off.
7. At least 500 ml of fuel for Accord or 700 ml for Prelude should flow in 60 seconds.
8. If the volume is less than specified, replace the pump.
9. Remove the jumper in the fuse box. Install the fuel cut-off relay and attach the fuse box in place.
