Pontiac 12615503 Throttle Body Assembly (W/ Throttle Actuator)

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To remove the upper intake manifold, first disconnect the negative battery cable and relieve fuel system pressure. Disconnect various electrical connectors, including those for the EVAP canister purge solenoid and MAP sensor, and remove the PCV crankcase ventilation hose. Remove the upper intake manifold mounting bolts and throttle body mounting studs, and discard the old gasket. To remove the fuel pulsation damper, remove the retaining clip and pull it out of the Throttle Body, then discard the old o-ring. To remove the throttle body and injectors, remove the fuel supply line and various seals, detach the injector poppet nozzles, and remove the injector retainer nuts and retainer. Installation for all components is the reverse of removal, using new gaskets and o-rings where necessary and tightening fasteners to proper torque specifications.

Pry the bracket locking tabs away from the fuel meter body and remove the assembly.

During installation, a new throttle body gasket should be used and the removal steps should be reversed, ensuring to tighten the mounting bolts to the specified torque.

Disconnect the negative battery cable and relieve fuel system pressure.

Use a new gasket and tighten the mounting fasteners to the torque specifications.

Clean it with solvent or carburetor cleaner that is safe for oxygen sensor systems and catalytic converters.

The smooth operation of the throttle linkage and the presence of any carbon or residue build-up in the throttle body bore.