2. Disconnect the suction hose A from the fuel pump and connect the vacuum pump B.
3. Start the engine and check the vacuum hoses and tubes.
- If there is a vacuum, proceed to step 4.
- If there is no vacuum, replace the fuel filter.
4. Turn the ignition key to the "OFF" position.
5. Connect vacuum pump A to the suction pump and apply vacuum to pump B.
- If the vacuum holds, check for a blockage in the suction line and replace the three-way union.
- If the vacuum does not hold, proceed to step 6.
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6. Disconnect the ventilation hose A on the filler side from the three-way joint and install the rubber cap C on the three-way joint.
7. Connect vacuum pump A to the suction pump and apply vacuum to pump B.
- If vacuum holds, check for blockage between the three-way connection and the fuel tank vapor/liquid separator valve on the vent line. If line is OK, replace fuel tank.
- If the vacuum does not hold, proceed to step 8.
8. Connect vacuum pump A to vent hose B on the filler neck side and apply air pressure to the hose.
- If the air pressure holds, check for a blockage between the three-way joint and the base of the filler neck on the vent line.
- If the air pressure does not hold, proceed to step 9.
9. Remove the rubber cap from the three-way joint, reconnect the ventilation hose to the three-way joint.
10. Connect vacuum pump A to suction hose B and apply air pressure to the hose.
- If the air pressure holds, the vent line and suction line are OK.
- If the air pressure does not hold, check for vacuum leaks at the suction hose and replace the three-way union.
(Material obtained from the website «hondabook»)