The intake manifold consists of two pieces, the outer portion, known as the intake manifold, and the inner portion, referred to as the injector base. To begin removal, relieve the fuel system pressure if the injector base will also be removed; otherwise, this step can be skipped. Disconnect the cable from the negative terminal of the battery. If the injector base is to be removed, drain the engine coolant. Next, remove the intake manifold cover and the intake duct between the throttle body and the air filter housing. Disconnect the accelerator cable and, if applicable, the cruise control cable from the throttle body, positioning them off to the side. Clamp off the coolant hoses attached to the throttle body and detach them, being prepared for some coolant spillage. Remove the splash shield from below the engine compartment, disconnect the wiring harness clamps, and position the harness aside. Remove the intake manifold brace and disconnect the power brake booster vacuum hose from the intake manifold, along with the EVAP hose from the throttle body. For models with an automatic transaxle, also remove the small vacuum hose from the rear side of the intake manifold. Disconnect the IAC valve, TPS, and any other electrical connectors that may obstruct manifold removal, then remove the bolt and detach the wiring harness from the front of the manifold. Remove the intake manifold mounting bolts and nuts, then separate the intake manifold from the injector base. Detach the PCV hose from the pipe on top of the injector base, remove the fuel rail and injectors, and detach the coolant hose from the pipe on the underside of the injector base. Finally, remove the injector base mounting bolts and nuts to detach it from the cylinder head. For installation, reverse the removal steps while ensuring to clean away all traces of old gasket material, install new gaskets, and tighten the fasteners to the specified torque, starting with the center bolts and working towards the ends. If the injector base was removed, refill the cooling system; if only the intake manifold was removed, check and adjust the coolant level as necessary. After reconnecting the accelerator and cruise control cables, adjust them if needed, reconnect the battery, and run the engine to check for leaks.
