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 MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 557 (FUEL SYSTEM (L3))FUEL LINE PRESSURE INSPECTION [L3]
2010 Mazda 5 Sport, 2.3 L, Standard
Fuel Line Pressure Inspection [L3]
2010 Mazda 5 Sport, 2.3 L, StandardSECTION Fuel Line Pressure Inspection [L3]
WARNING: This page is about a different car, the 2008 Mazda 5. 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 "BEFORE SERVICE PRECAUTION" before performing any work operations to prevent fuel from spilling from the fuel system. (See BEFORE SERVICE PRECAUTION [L3] .)
- Remove the battery cover. (See BATTERY REMOVAL/INSTALLATION [L3] .)
- Disconnect the negative battery cable.
- Disconnect the quick release connector (in the engine compartment). (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION [L3] .)
- Turn the lever of the SST parallel to the hose as shown in the figure.
- Insert the SST quick release connector into the fuel pipe until a click is heard.
- Verify that the quick release connector is firmly connected by pulling it by hand.
- Connect the negative battery cable.
- Ground the following PCM terminal 1BG using a jumper wire.
- Turn the ignition switch to the ON position to start the fuel pump.
- Operate the fuel pump for 10 s.
- Measure the fuel line pressure.
- If not within the specification, inspect the following:
If it less than the specification:
- Fuel pump unit
- Fuel line leakage
If it exceeds the specification:
- Pressure regulator
Fuel line pressure (Reference)
350-410 kPa {3.57-4.18 kgf/cm 2 , 50.8-59.4 psi}
- If not within the specification, inspect the following:
- Turn the ignition switch to the LOCK position to stop the fuel pump.
- Measure the fuel hold pressure after 5 min.
- If not within the specification, inspect the following:
- Fuel line for clogging or leakage
Fuel hold pressure (Reference)
250 kPa {2.55 kgf/cm 2 , 36.3 psi} or more
- Fuel line for clogging or leakage
- If not within the specification, inspect the following:
- Disconnect the SST .
- Connect the quick release connector. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION [L3] .)
- Inspect all related parts by performing "AFTER SERVICE PRECAUTION". (See AFTER SERVICE PRECAUTION [L3] .)
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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.