Honda Civic. Manual — part 696

6. Connect the fuel tank unit 4P connector, then connect the quick-connect fitting.
7. Reconnect the negative cable to the battery, and turn the ignition switch ON

(II) (but do not operate the starter motor). The fuel pump will run for about 2
seconds, and fuel pressure will rise. Repeat this two or three times, then check
that there is no leakage in the fuel supply system.

8. Install the access panel (A) to the floor.

Fig. 54: Installing The Access Panel To The Floor
Courtesy of AMERICAN HONDA MOTOR CO., INC.

9. Install the rear floor upper cross-member (A).

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System (R18A1) - Civic (Except Hybrid)

Fig. 55: Installing The Rear Floor Upper Cross-Member
Courtesy of AMERICAN HONDA MOTOR CO., INC.

10. Install the rear seat cushion (see SEAT CUSHION )

FUEL PRESSURE REGULATOR REPLACEMENT

1. Remove the fuel tank unit (see FUEL TANK UNIT

REMOVAL/INSTALLATION ).

2. Remove the bracket (A).

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System (R18A1) - Civic (Except Hybrid)

Fig. 56: Removing Bracket
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Remove the ground ring (B).
4. Remove the fuel pressure regulator (C).
5. Install the parts in the reverse order of removal with new O-rings (D) and a

new bracket (A). When installing the fuel tank unit, align the marks on the unit
and the fuel tank (see INSTALLATION ).

FUEL FILTER REPLACEMENT

The fuel filter should be replaced whenever the fuel pressure drops below the
specified value (see FUEL PRESSURE TEST ), after making sure that the fuel
pump and the fuel pressure regulator are OK.

1. Remove the fuel tank unit (see FUEL TANK UNIT

REMOVAL/INSTALLATION ).

2. Remove the fuel filter (A).

NOTE:

Coat the O-rings with clean engine oil; do not use any
other oil. Do not pinch the O-rings during installation.

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System (R18A1) - Civic (Except Hybrid)

Fig. 57: Removing Fuel Filter
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Check these items before installing the fuel tank unit:

When connecting the wire harness, make sure the connection is secure and
the connectors (B) are firmly locked into place.

When installing the fuel gauge sending unit (C), make sure the connection
is secure and the connector is firmly locked into place. Be careful not to
bend or twist it excessively.

4. Install the parts in the reverse order of removal with new O-rings (D). When

installing the fuel tank unit, align the marks on the unit and the fuel tank (see
INSTALLATION ).

FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT

1. Remove the fuel tank unit (see FUEL TANK UNIT

REMOVAL/INSTALLATION ).

2. Remove the fuel level sensor (fuel sending unit) (A) from the fuel tank unit

(B).

NOTE:

Coat the O-rings with clean engine oil; do not use any
other oil.

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System (R18A1) - Civic (Except Hybrid)