Chrysler Front Wheel Drive Cars 4-CYL 1981-1995 Repair Information

Throttle Body and Fuel Body Assembly

Print

The throttle body used for the Eagle TBI system is constructed of two main pieces rather than one, like the component used for the Chrysler EFI system. The upper half is referred to as the fuel body assembly, whereas the lower half is known as the throttle body. Both halves are removed from the vehicle together, then they can be separated.

REMOVAL & INSTALLATION



See Figures 1, 2 and 3

Click image to see an enlarged view

Fig. Fig. 1: Identification of throttle body related items used with the Eagle TBI system



Click image to see an enlarged view

Fig. Fig. 2: To remove the throttle body, both the MAP sensor and CCV vacuum tubes must be detached from the throttle body



Click image to see an enlarged view

Fig. Fig. 3: Remove the 2 mounting screws to separate the fuel body from the throttle body

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the air cleaner bonnet (air cleaner assembly).
  4.  
  5. Detach the accelerator cable and cruise control cable, if equipped, from the throttle body.
  6.  
  7. Remove the fuel tank filler cap to vent any fuel tank pressure.
  8.  
  9. Disconnect the fuel lines by squeezing the retainer tabs and pulling straight out. Note that the retainer stays on the fuel tubes.
  10.  
  11. Detach the Throttle Position Sensor (TPS) wiring harness connectors.
  12.  
  13. Disengage the Idle Speed Control (ISC) motor wiring harness connector.
  14.  
  15. Remove the fuel injector wiring harness connector from the injector.
  16.  
  17. Separate the Crankcase Ventilation (CCV) and Manifold Absolute Pressure (MAP) sensor vacuum connector from the side of the throttle body.
  18.  
  19. Remove the support brace from the cable bracket, if equipped.
  20.  
  21. Remove the throttle body mounting bolts, then lift the throttle body off of the intake manifold.
  22.  
  23. Remove the old gasket from the intake manifold, then clean the throttle body and intake manifold mating surfaces.
  24.  
  25. To separate the throttle body from the fuel body assembly, perform the following:
    1. Remove the fuel body-to-throttle body mounting screws.
    2.  
    3. Remove the fuel body from the throttle body.
    4.  
    5. Remove the old gasket, then clean the fuel body and throttle body mating surfaces.
    6.  

  26.  

To install:
  1. If the throttle body and fuel body were separated earlier, perform the following:
    1. Install the fuel body onto the throttle body with a new gasket.
    2.  
    3. Install and tighten the fuel body-to-throttle body attaching screws until secure.
    4.  

  2.  

If a new throttle body is being installed and the TPS and ISC motor are being reused from the original throttle body, they must be adjusted. Refer to Driveability & Emission Controls for these procedures.

  1. Position a new gasket onto the intake manifold.
  2.  
  3. Install the Throttle Position Sensor (TPS) onto the intake manifold, then install and tighten the attaching bolts to 35 inch lbs. (4 Nm).
  4.  
  5. Connect the support bracket to the cable bracket.
  6.  
  7. Attach the CCV and the MAP sensor vacuum connector to the throttle body.
  8.  
  9. Fasten the fuel injector wiring harness connector to the injector.
  10.  
  11. Attach the ISC motor and TPS wiring harness connectors.
  12.  
  13. Lubricate the fuel supply and return tube ends with clean 30 weight engine oil. No other lubricant may be used.
  14.  
  15. Attach the grey fuel return tube to the connector next to the pressure regulator. Fasten the black fuel supply tube to the connector next to the throttle linkage. Push them into the fitting until a click is heard. Verify that the connections are complete by first ensuring that only the retainer tabs protrude from the connectors, and second by pulling out on the fuel tubes to ensure that they are locked in place.
  16.  
  17. Connect the accelerator cable and, if equipped, the cruise control cable to the throttle body.
  18.  
  19. Install the air cleaner assembly.
  20.  
  21. Install the fuel tank filler cap.
  22.  
  23. Connect the negative battery cable.
  24.  
  25. Adjust the TPS and ISC motor, if necessary, as described in Driveability & Emission Controls .
  26.  

ADJUSTMENTS



Idle Speed

On all fuel-injected models idle speed is automatically controlled by the Powertrain Control Module. The idle speed cannot manually be adjusted.

Idle Mixture

The air/fuel mixture on all fuel-injected cars covered by this information is automatically controlled by the Powertrain Control Module (PCM). The mixture is not adjustable, nor does it require routine adjusting.

 
label.common.footer.alt.autozoneLogo