Nissan Sentra manuals

Nissan Sentra Service Manual: Fuel pressure

Work Procedure

FUEL PRESSURE RELEASE

1.FUEL PRESSURE RELEASE

With CONSULT


  1. Turn ignition switch ON.
  2. Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT” mode of “ENGINE” using CONSULT
  3. Start engine.
  4. After engine stalls, crank it two or three times to release all fuel pressure.
  5. Turn ignition switch OFF.

Without CONSULT


  1. Remove fuel pump fuse located in IPDM E/R.
  2. Start engine.
  3. After engine stalls, crank it two or three times to release all fuel pressure.
  4. Turn ignition switch OFF.
  5. Reinstall fuel pump fuse after servicing fuel system.

>> END

FUEL PRESSURE CHECK

CAUTION:

NOTE:

Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel pressure cannot be completely released because this models do not have fuel return system.

1.FUEL PRESSURE CHECK

  1. Release fuel pressure to zero.
  2. Prepare fuel hose for fuel pressure check (B) and fuel tube adapter [SST: KV1011840] (D), then connect fuel pressure gauge (A).

To fuel tube To quick connector


Clamp To fuel tube


Clamp


CAUTION:


CAUTION:

  1. Remove fuel hose.

CAUTION:

Do not twist or kink fuel hose because it is plastic hose.

  1. Connect fuel hose for fuel pressure check with to fuel tube
    clamp  as shown in the figure.with
    clamp as shown in the figure.

5: No. 2 spool

CAUTION:


CAUTION:

Tightening torque: 1 - 1.5 NВ·m (0.1 - 0.15 kg-m, 9 - 13 in-lb)

  1. Connect fuel tube adapter to quick connector.

A :Fuel pressure gauge

B :Fuel hose for fuel pressure check

After connecting fuel hose for fuel pressure check, pull the hose


After connecting fuel hose for fuel pressure check, pull the hose with a force of approximately 98 N (10 kg, 22 lb) to confirm high pressure fuel pump does not come off.

  1. Turn ignition switch ON and check for fuel leakage.
  2. Start engine and check for fuel leakage.
  3. Read the indication of fuel pressure gauge.

CAUTION:

At idling : Approximately 350 kPa (3.5 bar, 3.57 kg/cm2, 51 psi)

Is the inspection result normal? YES >> INSPECTION END

NO >> GO TO 2.

2.CHECK FUEL HOSES

Check the following.

Is the inspection result normal?

YES >> Replace fuel pressure regulator.

NO >> Repair or replace error-detected parts.

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