Chrysler Full-Size Trucks 1967-1988 Repair Guide

Throttle Body

Print

See Figures 1 and 2

The throttle body assembly replaces a conventional carburetor and is mounted on top of the intake manifold. The throttle body houses the fuel injectors, pressure regulator, throttle position sensor, automatic idle speed motor and throttle body temperature sensor. Air flow through the throttle body is controlled by cable operated throttle blades located in the base of the throttle body. The throttle body itself provides the chamber for metering, atomizing and distributing the fuel and air entering the engine.



Click image to see an enlarged view

Fig. Fig. 1: Throttle body injection components

REMOVAL & INSTALLATION



  1. Remove the air cleaner.
  2.  
  3. Perform the fuel system pressure release.
  4.  
  5. Disconnect the negative battery cable.
  6.  
  7. Disconnect the vacuum hoses and unplug the electrical connectors.
  8.  
  9. Remove the throttle cable and, if so equipped, speed control and kickdown cables.
  10.  
  11. Remove the return spring.
  12.  



Click image to see an enlarged view

Fig. Fig. 2: Throttle body mounting

  1. Remove the fuel inlet and return hoses.
  2.  
  3. Remove the throttle body mounting screws, then lift the throttle body from the engine.
  4.  

To install:
  1. Make sure the mounting surfaces are clean. When installing the throttle body, use a new gasket, then position the throttle body and torque the mounting screws to 14 ft. lbs. (1.6 Nm).
  2.  
  3. Install the fuel inlet and return hoses using new original equipment-type clamps.
  4.  
  5. Install the return spring.
  6.  
  7. Install the throttle cable and bracket. If so equipped, install the kickdown and speed control cables.
  8.  
  9. Engage the wiring connectors and vacuum hoses.
  10.  
  11. Install the air cleaner.
  12.  
  13. Reconnect the negative battery cable.
  14.  

 
label.common.footer.alt.autozoneLogo