Honda Civic. Manual — part 690

7. Disconnect the negative cable from the battery.
8. Remove the quick-connect fitting cover (A).

Fig. 30: Removing Quick-Connect Fitting Cover
Courtesy of AMERICAN HONDA MOTOR CO., INC.

9. Check the fuel quick-connect fitting for dirt, and clean it if needed.

10. Place a rag or shop towel over the quick-connect fitting (A).

Fig. 31: Placing Rag Or Shop Towel Quick-Connect Fitting Cover
Courtesy of AMERICAN HONDA MOTOR CO., INC.

11. Disconnect the quick-connect fitting (A): Hold the connector (B) with one

hand, and squeeze the retainer tabs (C) with the other hand to release them
from the locking tabs (D). Pull the connector off.

NOTE:

Be careful not to damage the line (E) or other parts.

2008 Honda Civic GX

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

12. After disconnecting the quick-connect fitting, check it for dirt or damage (see

step 4 in FUEL LINE/QUICK-CONNECT FITTING REMOVAL ).

13. Reconnect the negative cable to the battery, then do this:
14. Enter the anti-theft code for the audio system or the navigation system (if

equipped), then enter the audio presets. Set the clock ( on vehicles without
navigation).

FUEL PRESSURE TEST

Special Tools Required

Fuel pressure gauge 07406-004000B

Fuel pressure gauge attachment set 07AAJ-S6MA150

1. Relieve the fuel pressure (see FUEL PRESSURE RELIEVING ).
2. Disconnect the quick-connect fitting. Attach the fuel pressure gauge set and the

Do not use tools.

If the connector does not move, keep the retainer
tabs pressed down, and alternately pull and push
the connector until it comes off easily.

Do not remove the retainer from the line; once
removed, the retainer must be replaced with a new
one.

Fig. 32: Disconnecting Quick-Connect Fitting
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2008 Honda Civic GX

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

fuel pressure gauge.

Fig. 33: Attaching Fuel Pressure Gauge Set And Fuel Pressure Gauge
Courtesy of AMERICAN HONDA MOTOR CO., INC.

3. Start the engine, and let it idle.

If the engine starts, go to step 5.

If the engine does not start, go to step 4.

4. Check to see if the fuel pump is running: Listen to the fuel filler port with the

fuel fill cap removed. The fuel pump should run for 2 seconds when the
ignition switch is first turned on.

If the pump runs, go to step 5.

If the pump does not run, do the fuel pump circuit troubleshooting (see
FUEL PUMP CIRCUIT TROUBLESHOOTING ).

5. Read the fuel pressure gauge. The pressure should be 380-430 kPa (3.9-4.4

kgf/cm

2

, 55-63 psi).

If the pressure is OK, the test is complete.

If the pressure is out of specification, replace the fuel pressure regulator
(see FUEL PRESSURE REGULATOR REPLACEMENT ) and the
fuel filter (see FUEL PRESSURE REGULATOR REPLACEMENT ),
then recheck the fuel pressure.

FUEL TANK DRAINING

2008 Honda Civic GX

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

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

REMOVAL/INSTALLATION ).

2. Using a hand pump, a hose, and a container suitable for fuel, draw the fuel

from the fuel tank.

3. Reinstall the fuel tank unit (see INSTALLATION ).

FUEL LINE INSPECTION

Check the fuel system lines and hoses for damage, leaks, and deterioration. Replace
any damaged parts.

Fig. 34: Checking Fuel System Lines And Hoses
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Check all clamps, and make sure they are properly positioned and tightened.

2008 Honda Civic GX

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