Honda Civic. Manual — part 678

Fig. 91: Moving Fuel Pressure Regulator

12. Remove fuel pressure regulator P1 (A).

Fig. 92: Identifying Fuel Pressure Regulator

13. Remove the stay (A).

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX

Fig. 93: Identifying Stay With Torque Specifications

14. Install fuel pressure regulator P1 in the reverse order of removal. Be careful not

to deform any of the lines, and assemble them securely when you reinstall the
heater hoses.

15. Refill the radiator with engine coolant, refer to the COOLANT

REPLACEMENT .

16. Do the leak inspection procedure (see LEAK INSPECTION ).

FUEL PRESSURE SWITCH REPLACEMENT

1. Remove fuel pressure regulator P1 (see FUEL PRESSURE REGULATOR

P1 REPLACEMENT ).

2. Remove the fuel pressure switch (A).

NOTE:

Apply silicone oil or polyalkyleneglycol (PAG) oil to a
new O-ring and the fuel pressure regulator (see FUEL
TANK SCRAPPING ).

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX

Fig. 94: Identifying Fuel Pressure Switch And O-Ring

3. Apply silicone oil or polyalkyleneglycol (PAG) oil to a new O-ring (B) and

carefully install it into its proper position (see FUEL TANK SCRAPPING ).

4. Install the parts in the reverse order of removal.
5. Do the leak inspection procedure (see LEAK INSPECTION ).

FUEL RAIL PRESSURE SENSOR REPLACEMENT

1. Relieve fuel pressure between the engine and the manual shut-off valve (see

FUEL PRESSURE RELIEVING ).

2. Remove the cowl cover and under-cowl panel, refer to the COWL COVER

REPLACEMENT .

3. Remove the fuel feed hose (A).

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX

Fig. 95: Identifying Fuel Feed Hose, Fuel Rail Pressure Sensor With
Torque Specifications

4. Remove the fuel rail pressure sensor (B).
5. Apply silicone oil or polyalkyleneglycol (PAG) oil to a new O-ring (C) and

carefully install it into its proper position (see FUEL TANK SCRAPPING ).

6. Install the parts in the reverse order of removal.
7. Do the leak inspection procedure (see LEAK INSPECTION ).

FUEL TEMPERATURE SENSOR REPLACEMENT

1. Relieve fuel pressure between the engine and the manual shut-off valve (see

FUEL PRESSURE RELIEVING ).

2. Remove the cowl cover and under-cowl panel, refer to the COWL COVER

REPLACEMENT .

3. Disconnect the fuel temperature sensor connector (A).

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX