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.
2004 Infiniti M45FACTORY OEM SERVICE PROCEDURE
5. Check Fuel Pressure
- Release fuel pressure to zero. Refer to FUEL PRESSURE RELEASE .
- Install fuel pressure gauge and check fuel pressure. Refer to FUEL PRESSURE CHECK .
At idling: 350 kPa (3.57 kg/cm2 , 51 psi)
OK or NG
- OK: GO TO 7. CHECK MASS AIR FLOW SENSOR .
- NG: GO TO 6.
Factory Service Tools
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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.