Honda Fit: Breather Line and Suction Line Inspection (Page-2)

10. Attach the fuel pressure gauge attachment. Then connect the vacuum pump/gauge (A) to the suction line (B), and apply vacuum to the line:

    • If the line holds vacuum, check for a blockage in the suction line and the fuel tank vapor recirculation tube. If there is a blockage, replace the fuel tank. If the fuel tank vapor recirculation tube is OK, replace the suction line.

    • If the line does not hold vacuum, go to step 11.

1. Raise the vehicle on a lift.

12. Connect a T-fitting (A), a vacuum gauge, and the vacuum pump/gauge (B) to the filler side of the breather line (C) as shown. Then apply pressure to the line:

    • If the pressure holds, check for a blockage between the suction line and the filler neck on the breather pipe, then replace the part that is causing the blockage.

    • If the pressure does not hold, go to step 13.

13. Remove the rubber cap from the suction line, and reconnect the breather pipe to the suction line.

14. Attach the fuel pressure gauge attachment. Then connect the T-fitting (A), the vacuum gauge, and the vacuum pump/gauge (B) to the suction line (C) as shown. then apply pressure to the line:

    • If the pressure holds, the breather line and the suction line are OK.

    • If the pressure does not hold, check for a vacuum leak in the suction line, and replace the suction line if needed.