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 46 (ENGINE CONTROLS - SELF-DIAGNOSTICS)SYSTEM TESTSFUEL LINE PRESSURE/FUEL PRESSURE HOLD INSPECTION
2010 Mazda 5 Sport, 2.3 L, Standard
Fuel Line Pressure/Fuel Pressure Hold Inspection
2010 Mazda 5 Sport, 2.3 L, StandardSECTION Fuel Line Pressure/Fuel Pressure Hold Inspection
WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
- Check Fuel Pressure
Release fuel pressure. See FUEL PRESSURE RELEASE . Connect scan tool to DLC. Select Active Command Mode. Select Output Test Mode. Press Mode to change to ALL ON mode. Press Start to run fuel pump. Observe fuel pressure. If fuel pressure is 56-72 psi (389-499 kPa), go to step 2 . If fuel pressure is not 56-72 psi (389-499 kPa):- For zero psi or low pressure, check fuel pump. Repair as necessary. If fuel pump is okay, check fuel line and/or fuel filter for restriction.
- For high fuel pressure, see FUEL PRESSURE REGULATOR under SYSTEM TESTS.
- Check Fuel Pressure After One Minute
Observe fuel pressure after one minute. If fuel pressure is within 5 psi (34 kPa) of previous reading, fuel pressure hold is okay. If fuel pressure is not within 5 psi (34 kPa) of previous reading, check for fuel injector leakage. See FUEL INJECTOR INSPECTION under SYSTEM TESTS.
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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.