Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 629 (FUEL SYSTEM)FUEL PUMP UNIT INSPECTIONHOLD PRESSURE INSPECTION
2008 Mazda 6 s Sport, 4D Hatchback, Standard
Hold Pressure Inspection
2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Hold Pressure Inspection
WARNING: This page is about a different car, the 2008 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
- Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death and damage. To prevent this, complete the following inspection with the engine stopped.
- Follow the before repair procedure and perform the fuel line safety procedure. (See BEFORE REPAIR PROCEDURE ).
- Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION )
- Disconnect the engine compartment-side quick release connector. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION )..
- Turn the SST lever so that it is 90° to the hose and then plug the outlet of the SST .
- Reconnect the quick release connector of the SST to the fuel pipe until a click is heard.
- Verify that the quick release connector is firmly connected by pulling it by hand.
- Prevent the fuel spillage by placing the fuel hose outlet (rubber hose) of the SST into a container
- Connect the negative battery cable.CAUTION:
- Shorting the wrong terminal of the check connector may cause malfunctions. Make sure to short only the specified terminal.
- Ground the check connector terminal F/P using the jumper wire.
- Turn the ignition switch to the ON position for 10 min and then operate the fuel pump.
- Measure the fuel pressure 5 min
after turning the ignition switch to the LOCK position.
- If not within the specification, inspect the following:
- Fuel filter clogging (low-pressure side and high-pressure side)
- Fuel line clogging or leakage
Standard 200 kPa {2.0 kgf/cm 2 , 29 psi} or more
- If not within the specification, inspect the following:
- Disconnect the jumper wire.
- Follow the before repair procedure and practice the fuel line safety procedure. (See BEFORE REPAIR PROCEDURE ).
- Disconnect the SST .
- Connect the quick release connector. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION ).
- Inspect all parts by performing the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE ).
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.