Throttle Body: Service and Repair

THROTTLE BODY

REMOVAL

WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel-related components. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions can result in personal injury.

CAUTION: The throttle body bore and plate area have a special coating and cannot be cleaned.

NOTE: Gasoline engine shown, natural gas is similar.

1. Remove the air cleaner outlet tube.







2. Disconnect the throttle position (TP) sensor electrical connector.







3. Disconnect the throttle return spring, and the accelerator and speed control cables.







4. NOTE: Discard the throttle body (TB) gasket.

Remove the four bolts and the throttle body.

INSTALLATION







1. Install a new throttle body (TB) gasket, the throttle body, and the bolts.
- Tighten the bolts in two stages.
- Stage 1: Tighten to 9 Nm (80 lb-in).
- Stage 2: Rotate an additional 90 degrees.







2. Connect the throttle return spring and the accelerator and speed control cables.







3. Connect the throttle position (TP) sensor electrical connectors.
4. Install the air cleaner outlet tube.