Jeep Wrangler/YJ 1987-1995 Repair Guide

Throttle Body

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REMOVAL & INSTALLATION



See Figure 1



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Fig. Fig. 1: Throttle body replacement

  1. Disconnect the negative battery cable. Remove the upper air cleaner assembly.
  2.  
  3. Remove the lower air cleaner assembly retaining bolts. then remove the lower air cleaner assembly.
  4.  
  5. Remove the throttle cable and the return spring. Unplug the wire harness connector from the injector.
  6.  
  7. Unplug the wire harness connector from the wide open throttle switch. Unplug the wire harness connector from the ISC motor.
  8.  
  9. Disconnect the fuel supply pipe and return pipes from the throttle body.
  10.  
  11. Label and disconnect the vacuum hoses from the throttle body assembly.
  12.  
  13. Remove the throttle body-to-manifold retaining bolts, then remove the throttle body assembly from the intake manifold.
  14.  

To install:
  1. Clean the manifold and throttle body mating surfaces. Be sure to use a new gasket between the throttle body assembly and the intake manifold.
  2.  
  3. Install the throttle body assembly on the intake manifold. Torque the nuts to 16 ft. lbs. (22 Nm).
  4.  
  5. Connect the vacuum hoses to the throttle body assembly.
  6.  
  7. Connect the fuel supply and return pipes to the throttle body. Connect the fuel return pipe to the throttle body.
  8.  
  9. Engage the wire harness connector to the wide open throttle switch and the wire harness connector to the ISC motor.
  10.  
  11. Install the throttle cable and the return spring. Engage the wire harness connector to the injector.
  12.  
  13. Install the lower air cleaner assembly. Install the lower air cleaner assembly retaining bolts and tighten securely.
  14.  
  15. Install the upper air cleaner assembly.
  16.  
  17. Connect the negative battery cable.
  18.  

 
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