Throttle Body Unit

REMOVE/DISCONNECT
- Air cleaner assembly and discard gasket.
- Electrical connectors from idle air control valve (IAC), throttle position sensor (TPS), and fuel injectors (squeeze plastic tabs on injector connector and pull straight up).
- Grommet with injector wires and lay aside.
- Throttle linkage, return spring(s), transmission control cable, and cruise control (wherever applicable).
- Cable support bracket attaching screws and bracket.
- Vacuum hoses, noting position of hoses.
- Inlet and outlet fuel lines.
NOTE Relieve fuel pressure before disconnecting fuel lines and use a back-up wrench on inlet and outlet nuts.
- Fuel line O-rings from fuel nuts and discard.
- TBI unit mounting hardware.
- TBI unit.
NOTE To prevent damage to the throttle valve, it is essential that the unit be placed on a holding fixture, before performing service.
- TBI flange (manifold mounting) gasket.
NOTE Before removing old gasket from surface of intake manifold, stuff the manifold opening with a clean rag to prevent material from entering the engine.

INSPECT
- Manifold bore for loose parts and foreign material.
- Intake manifold sealing surface for cleanliness.

INSTALL/CONNECT
- New TBI flange (manifold mounting) gasket.
- TBI unit with mounting hardware. Tighten to 25.0 Nm (18.0 lb.ft.)
- New O-rings on fuel line nuts and coat with new engine oil. Use a back-up wrench and tighten to 27.0 Nm (20 lb.ft.).
- Vacuum hoses.
- Cable support bracket attaching screws and bracket. Tighten to 10.0 Nm (88 lb.in.)
- Throttle linkage, return spring(s), transmission control cable, and cruise control (wherever applicable).
- Grommet, with injector harness, to throttle body.
- Electrical connectors. Ensure connectors are fully seated and latched.
- Check to see if accelerator pedal is free, by depressing pedal to the floor and releasing, while engine is "OFF".
- Check for fuel leaks around fuel line nuts. Apply fuel pressure by turning ignition "ON" with engine "OFF".
- Air cleaner assembly with new gasket.
NOTE: Ensure injectors wires are not pinched between TBI and air cleaner assembly.
- Start engine check again for fuel leaks.