Fuel Pressure: Testing and Inspection

INSPECT FUEL PRESSURE

a. Check that battery voltage is approximately 12.0 V.

b. Disconnect the Negative (-) terminal cable from the Battery.

c. Put a suitable container or shop rag under the Fuel Filter.

Loosen The Union Bolt Slowly:

d. Remove the union bolt and 2 gaskets, and disconnect the fuel inlet hose from the Fuel Filter outlet.

HINT: Slowly loosen the union bolt.

Always Use 3 New Gaskets:

e. Install the fuel inlet hose and SST (pressure gauge) to the Fuel Filter outlet with 3 new gaskets and the union bolt. (SST 09268-45012)

Torque: 29 Nm (22 ft.lb)

f. Wipe off any splattered gasoline.

g. Reconnect the Negative (-) terminal cable to the Battery.

Jumping B+ To FP Terminals At DLC 1:

h. Using SST, connect terminals +B and FP of the Data Link Connector (DLC) 1. (SST 09843-18020)

i. Turn the Ignition Switch ON.

Fuel Pressure Gauge Attached:

j. Measure the fuel pressure.

Fuel pressure: 281 - 287 kPa (40.8 - 41.7 psi)

If pressure is high, replace the Fuel Pressure Regulator. If pressure is low, check the following parts:

^ Fuel hoses and connection

^ Fuel Pump

^ Fuel Filter

^ Fuel Pressure Regulator

Remove SST From DLC 1:

k. Remove the SST from the Data Link Connector 1. (SST 09843-18020)

l. Start the engine.

m. Disconnect the vacuum sensing hose from the Fuel Pressure Regulator, and plug the hose end.

Disconnect Vacuum Hose From Fuel Pressure Regulator And Plug:

n. Measure the fuel pressure at idle.

Fuel pressure: 281 - 287 kPa (40.8 - 41.7 psi)

o. Reconnect the vacuum sensing hose to the Fuel Pressure Regulator.

Reconnect Vacuum Hose To The Fuel Pressure Regulator:

p. Measure the fuel pressure at idle.

Fuel pressure: 226 - 265 kPa (33 - 37 psi)

If pressure is not as specified, check the vacuum sensing hose and Fuel Pressure Regulator.

q. Stop the engine.Check that the fuel pressure remains 147 kPa (21 psi) or more for 5 minutes after the engine is turned off.

If pressure is not as specified, check the Fuel Pump, Pressure Regulator and Injectors.

r. After checking fuel pressure, disconnect the Negative (-) terminal cable from the Battery and carefully remove the SST to prevent gasoline from splashing. (SST 09268-45012)

Use New Gaskets And Torque Union Bolt To 29 Nm (22 Lb.ft):

s. Connect the fuel inlet hose with 2 new gaskets and the union bolt.

Torque: 29 Nm (22 ft.lb)

t. Reconnect the Negative (-) terminal cable to the Battery.

u. Check for fuel leaks.