Fuel Pressure Hold Inspection

WARNING: Fuel line spills and leaks are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete the "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE"

1. Disconnect the negative battery cable.




2. Install a fuel pressure gauge between the fuel filter and the main fuel hose. (Install clamps as shown.)
3. Disconnect the negative battery cable.




4. Remove the fuel pump relay.

CAUTION: Connecting the wrong fuel pump relay socket terminals may possibly cause a malfunction. Carefully connect the specified terminal only.




5. Short the fuel pump relay socket terminal 30 to the body GND using a jumper wire.

CAUTION: Before connecting the negative battery cable be sure all fuel connections, clamps and fittings are secure. Fuel pump will operate at full pressure anytime the cable is connected to the battery. When the cable makes contact, it is sure to arc and create a danger of ignition or explosion.

6. Connect the negative battery cable for 10 seconds to operate the fuel pump.
7. Disconnect the negative battery cable and remove the jumper wire.

8. Observe the fuel pressure after 5 minutes.
- If not as specified. perform the following inspections.
- Fuel pump hold pressure.
- Pressure regulator hold pressure.
- Injector fuel leakage.

Fuel pressure
FS: More than 343 kPa {3.50 kgf/sq.cm, 49.8 psi}
KL: More than 147 kPa {1.50 kgf/sq.cm, 21.3 psi}