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Disconnect the negative battery cable. Place a clean drain pan under the radiator, open the drain **** and drain the cooling system.
Remove the air cleaner assembly and the fuel injector sight shield.
Disconnect the cables from the throttle body and mount bracket.
Remove the coolant recovery reservoir.
Remove the inner fender electrical cover on the right side.
Remove the right rear crossover pipe heat shield.
Disconnect the fuel lines from the fuel rail and from the cable bracket.
Remove the alternator and brace.
Remove the throttle body cable mounting bracket with the vacuum lines and disconnect the vacuum lines.
Tag and detach the electrical connections at the throttle body and both banks of fuel injectors.
Disconnect the vacuum hoses from the canister purge solenoid valve and transaxle module and intake connection.
Unbolt the power steering pump and move forward. DO NOT disconnect the fluid lines.
Tag and disconnect the spark plug wires position lay aside.
Disconnect the coolant bypass hose from the intake manifold.
Remove the solenoid valve mounting bracket and power steering support brace from the intake manifold.
Disconnect the heater pipes from the intake and front cover.
Remove the alternator support brace from the intake.
Disconnect the upper radiator hose from the housing.
Remove the thermostat housing and thermostat from the intake.
Detach the electrical connector from the temperature sensor and sensor switch.
Unfasten the intake manifold bolts, then remove the manifold as an assembly. Remove and discard the gaskets.
If separating the upper manifold from the lower, proceed as follows:
Remove the fuel rail and fuel injectors.
Detach the coolant sensor switch.
Remove the manifold end cap cover.
Remove the upper intake manifold and throttle body assembly from the lower manifold. Remove and discard the gaskets.
Thoroughly clean all gasket mating surfaces.
If replacing the upper manifold, proceed as follows:
Apply a 1⁄16 in. bead of Loctite® Instant Gasket Eliminator 51845 or equivalent to the lower manifold mating surface. Make sure to circle all bolt holes.
Carefully lower the upper manifold and throttle body assembly onto the lower manifold.
Tighten the upper manifold retaining bolts to 19 ft. lbs. (26 Nm).
Install the manifold end cap cover and the coolant sensor switch.
Install the fuel injectors and rail to the manifold assembly.
Clean the mating surfaces and install the intake manifold gaskets and seals. Apply sealer to the ends of the of the intake manifold seals.
Position the intake manifold and apply a suitable thread lock compound to the bolt threads. Tighten the retaining bolts to 88 inch lbs. (10 Nm), twice, in the sequence shown in the accompanying figure.
Attach the electrical connector to the temperature sensor and sensor switch.
Install the thermostat housing and thermostat with a new gasket.
Connect the alternator support brace to the intake.
Install the solenoid valve mounting bracket and power steering support brace to the intake manifold.
Connect the heater pipes to the intake and front cover.
Attach the coolant bypass hose to the intake manifold.
Install the power steering pump support bracket and tighten to 37 ft. lbs. (50 Nm).
Install the spark plug wires on both sides.
Install the belt tensioner pulley and tighten to 33 ft. lbs. (45 Nm).
Install the power steering pump.
Connect the vacuum hoses to the canister purge solenoid valve and transaxle module and intake connection.
Attach the electrical connections at the throttle body and both banks of fuel injectors.
Install the alternator and brace.
Connect the throttle body cable mounting bracket with the vacuum lines.
Install the right rear crossover pipe heat shield.
Install the cables to the throttle body.
Connect the fuel lines to the fuel rail and mount bracket.
Install the inner fender electrical cover on the right side.
Install the coolant recovery reservoir and upper radiator hose. Fill the cooling system.
Install the air cleaner assembly and the fuel injector sight shield.
If the manifold was replaced, install or connect the following:
Vacuum source manifold.
Positive Crankcase Ventilation (PCV) valve.
Manifold Absolute Pressure (MAP) sensor.
Throttle body assembly.
Upper-to-lower intake manifold carrier gasket to the upper intake manifold.
Carefully place the upper intake manifold onto the lower intake manifold. Ensure that the alignment pins in the upper intake manifold align with the holes in the lower intake manifold.
NOTE: Apply thread lock compound, to the bolt threads before assembly.
Install or connect the following:
Upper intake manifold. Tighten the upper intake manifold bolts in sequence to 89 in lbs (10 Nm)
Accelerator and the cruise control cables with the bracket to the throttle body.
EVAP purge solenoid vacuum line to the throttle body.
Connect the electrical connectors to the following:
Mass Air Flow (MAF) sensor
Manifold Absolute Pressure (MAP) sensor
Idle Air Control (IAC) valve
Throttle Position (T/P) sensor
EVAP purge solenoid
Install or connect the following:
Throttle body upper support bracket bolt. Tighten the bolt to 89 in lbs (10 Nm)
EGR valve wiring harness heat shield, nut and the bolt. Tighten the nut and the bolt to 89 in lbs (10 Nm)
the vacuum leak that causes this high idle is the gasket at the bottom of the upper intake manifold runners, they **** in, done 100's. to confirm this just spray carb cleaner at inside and outside base, when u hit the leak you will hear it. see photo.