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.
2003 Infiniti FX45FACTORY OEM SERVICE PROCEDURE
Checking Fuel Pressure
- Release fuel pressure to zero. See FUEL PRESSURE RELEASE . Install the inline fuel quick disconnected fitting between fuel damper and injector tube. See Fig 1, Fig 2, Fig 3 or Fig 4 . Connect the fuel pressure test gauge (quick connector adapter hose) to the inline fuel quick disconnected fitting.
- Turn ignition switch ON and check for fuel leakage. Start engine and check for fuel leakage. Record fuel pressure gauge reading. See FUEL PRESSURE table.
- If result is unsatisfactory, check the following, fuel hoses and fuel tubes for clogging, fuel filter for clogging, fuel pump, and fuel pressure regulator for clogging. If OK, replace fuel pressure regulator. If not OK, repair or replace components as necessary.
FUEL PRESSURE
| Application | psi (kg/cm2 ) |
|---|---|
| All Models | 51 (3.57) |
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.
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