REMOVAL & INSTALLATION
- Release the fuel system pressure, as described previously in this section.
- Disconnect the negative battery cable and remove the intake duct from the throttle chamber.
- Drain about 1 1 / 2 quarts (1.43 liters) of engine coolant. Remove the coolant hose.
- Detach the vacuum hoses and the electrical harness connector from the throttle chamber. Disconnect the accelerator cable from the throttle chamber.
- Remove the mounting bolts and the throttle chamber from the intake manifold.
- To install, use a new gasket and reverse the removal procedures. Torque the throttle chamber bolts to 9-13 ft. lbs. (12-18 Nm). Refill the cooling system.
- Check the throttle for smooth operation and make sure that the bypass port is clean and free of obstacles. Check to make sure the idle speed adjusting screw moves smoothly. Make all necessary adjustments.
Do not touch the EGR vacuum port screw or, on some later models, the throttle valve stopper screw, as they are factory adjusted.
Because of the sensitivity of the air flow meter, there cannot be any air leaks in the fuel system. Even the smallest leak could unbalance the system and affect the performance of the vehicle.
During every check, pay attention to hose connections, as well as the dipstick and oil filler cap for evidence of air leaks. Should you encounter any, take steps to correct the problem.