Engine Controls - Remove/install/overhaul 3.0: Removal & Installation Nissan Maxima A32

Removal

Align timing mark(s) to piston No. 1 at TDC on compression stroke. Mark rotor position in relation to distributor housing. Disconnect spark plug wires and wiring harness connectors from distributor. Remove distributor hold-down bolt(s). Remove distributor. Installation

1) To install, reverse removal procedure. Ensure mark(s) or indentations on distributor shaft and housing are aligned. Check distributor rubber "O" ring seal and replace as necessary.

2) After installing distributor, ensure distributor rotor is aligned with mark made during removal or set at cylinder No. 1 spark plug position. Check and adjust timing. See ADJUSTMENTS article. Tighten distributor hold-down bolt to specification. See TORQUE SPECIFICATIONS.

Removal & Installation

1. Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE under FUEL SYSTEM. Disconnect negative battery cable. Remove maintenance access cover. On models without a maintenance access cover, remove fuel tank. On all models, disconnect fuel lines and wiring harness connector.
2. Remove fuel pump mounting bolts. Remove fuel pump from fuel tank. To install, reverse removal procedure. Tighten fuel pump bolts or fuel pump lock ring to specification. See TORQUE SPECIFICATIONS.

Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . For fuel filter location, see FUEL FILTER LOCATION table. Remove fuel filter shield, if equipped. Loosen fuel hose clamps. Remove fuel filter. To install, reverse removal procedure.

1. Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE under FUEL SYSTEM. Disconnect negative battery cable. Disconnect accelerator and cruise control cables.
2. Disconnect wiring harness connectors from Auxiliary Air Control (AAC) valve, throttle position sensor and closed throttle switch. Release cooling system pressure. Drain cooling system. Remove coolant hose to air-cut valve.
3. Disconnect PCV hose. Disconnect vacuum hoses from vacuum gallery. Disconnect power valve actuator, power brake booster and EGR control valve. Remove EGR flare tube. Remove upper intake manifold collector. (Scheme 1)
4. Disconnect fuel pressure regulator vacuum hose, and fuel inlet and return hoses. Disconnect injector wire harness connectors. Remove fuel rail with injectors from intake manifold. Remove injectors from fuel rail. (Scheme 1)

Installation

Install NEW "O" rings on injectors and install injectors. Tighten injector retaining bolts to 26-35 INCH lbs. (2.9-3.9 N.m). Install fuel rail. Using NEW gaskets, install intake manifold collector and tighten bolts to specification. See TORQUE SPECIFICATIONS. To complete installation, reverse removal procedure. Start engine and check for leaks.

Scheme 1

1. HO2S are mounted in exhaust pipe, upstream and downstream of catalytic converter. HO2S sensor is equipped with a permanent pigtail which must be protected from damage when removing sensor.
2. Sensor may be difficult to remove when engine temperature is less than 120°F (49°C). Ensure sensor is free of contaminants; avoid using cleaning solvents of any type. Always use anti-seize compound on threads before installing. Tighten sensor to specification. See TORQUE SPECIFICATIONS.