Throttle Body (TBI): Overhaul
- Remove fuel injector from throttle body. See INJECTOR (TBI) under FUEL SYSTEM. DO NOT soak injector in any type of solvent or cleaner.
- Remove throttle position sensor and fuel pressure regulator from throttle body. See Fig 1. Remove attaching screws and separate upper and lower bodies.
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- DO NOT soak any electrical device or air valve in solvent or other cleaner. DO NOT put drills or wires into passages. Clean upper and lower passages with compressed air only.
- Assemble upper and lower bodies with new gasket. Install and torque upper-to-lower body attaching screws to 31 INCH lbs. (3.5 N.m).
- Install fuel pressure regulator with new "O" ring. Torque fuel pressure regulator mounting screws to 31 INCH lbs. (3.5 N.m).
- Install fuel injector. See INJECTOR (TBI). Apply thread locking compound to injector cover mounting screws and install cover.
- Torque injector cover screws to 17 INCH lbs. (1.9 N.m).
- Install throttle position sensor so adjusting holes slightly cover mounting bolt holes. See Fig 2. Turn sensor so mounting holes align.
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- Install sensor mounting bolts (finger tighten only). Clamp wiring harness securely to side of throttle body.