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Home >> Mazda >> 2000 >> Protege LX L4-1.6L DOHC >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Engine >> Tune-up and Engine Performance Checks >> Fuel Pressure >> Testing and Inspection >> Component Tests and General Diagnostics >> Fuel Pressure Hold Inspection

Fuel Pressure Hold Inspection

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

CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign materials.

1. Disconnect the negative battery cable.




2. Squeeze the tabs on the quick release connector of the fuel main hose and disconnect the plastic fuel hose.
3. Push the SST quick release connector into the fuel distributor and fuel main hose into the SST until a click is heard.




4. Turn the lever on the SST as shown.
5. Connect the negative battery cable.

CAUTION: Connecting the wrong DLC terminal may possibly cause a malfunction. Carefully connect the specified terminal only.




6. Short the DLC terminal F/P to the body GND using a jumper wire.
7. Turn the ignition switch on for approx. 10 sec. to operate the fuel pump.
8. Turn off the ignition switch and disconnect the jumper wire.
9. Observe the fuel pressure after 5 min.

Specification: More than 150 kPa {1.5 kgf/sq.cm, 22 psi}

- If the pressure is lower than specified proceed to Step 10.




10. Measure the fuel line pressure while turning the lever as shown.
- If the fuel line pressure holds, replace the pressure regulator. (See FUEL INJECTOR REMOVAL/INSTALLATION.)
- If fuel line pressure does not hold, inspect the fuel leaks from fuel line and fuel injector.




11. Disconnect the SST.

NOTE:
- A checker tab is integrated with the quick release connector for new plastic fuel hoses. The checker tab will be released from the quick release connector after it is completely engaged with the fuel pipe.

12. Inspect the plastic fuel hose and fuel pipe sealing surface for damage and deformation, and replace as necessary.
- If the quick release connector O-ring is damaged or has slipped, replace the plastic fuel hose.

13. Reconnect the fuel main hose to the fuel distributor until a click is heard.
14. Pull the quick release connector by hand and verify that it is installed securely.
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