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 MANUALSACURA20033.2CL BASEREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC DIAGNOSTIC PROCEDURESFUEL SYSTEMFUEL PRESSURE TESTING3.5RL
2003 Acura 3.2CL Base
Fuel Pressure Testing: 3.5RL
2003 Acura 3.2CL BaseSECTION 3.5RL
- Relieve fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . Connect Fuel Pressure Gauge (07406-0040001) at fuel filter service bolt. See Fig 1 . Reconnect negative battery cable. Start engine and allow to idle. Disconnect and clamp fuel pressure regulator vacuum hose. Observe fuel pressure on gauge. See REGULATED FUEL PRESSURE . If vehicle will not start, turn ignition switch on, wait 2 seconds, turn ignition off and then back on and observe fuel pressure.
- Ensure manifold vacuum is present at fuel pressure regulator vacuum hose. Reconnect fuel pressure regulator vacuum hose with engine at idle. Observe fuel pressure on gauge. See REGULATED FUEL PRESSURE . If fuel pressure is not as specified, check fuel pump. See FUEL PUMP CIRCUIT TESTING . If fuel pump is okay, go to next step.
- If fuel pressure is higher than specified, check for pinched or clogged fuel return hose or line between fuel rail and fuel tank. If fuel pressure is lower than specified, check for plugged fuel filter, faulty fuel pressure regulator or leakage in fuel line. Repair as necessary. Ensure system is operating properly and go to next step.
- Turn ignition off. Relieve fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . Reconnect vacuum hose to fuel pressure regulator. Remove fuel gauge. Reinstall fuel filter service bolt using NEW washers and tighten to 106 INCH lbs. (12 N.m).
RENDER: 1.0x
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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.