Nissan Maxima 1993-1998 Repair Guide

Throttle Body

Print

REMOVAL & INSTALLATION



See Figures 1 through 7

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the intake duct from the throttle body.
  4.  



Click image to see an enlarged view

Fig. Fig. 1: Removing the upper intake as an assembly will make throttle body removal easier

  1. Disconnect the vacuum hoses and the electrical harness connector(s) from the throttle body.
  2.  



Click image to see an enlarged view

Fig. Fig. 2: Unclip the connector from the bracket, then it can be unplugged

  1. Disconnect the accelerator cable and cruise control cable from the throttle cams.
  2.  



Click image to see an enlarged view

Fig. Fig. 3: Rotate the cam to the full open position, then pull the cable forward and up and push the end out from the cam

  1. Label all hoses and disconnect them as necessary.
  2.  
  3. Remove the mounting bolts and the throttle chamber from the intake manifold.
  4.  



Click image to see an enlarged view

Fig. Fig. 4: After the bolts are removed, pull the throttle body away from the manifold

  1. If the throttle position sensor needs to be removed, refer to Driveability & Emissions Controls for the procedure.
  2.  

To install:


Click image to see an enlarged view

Fig. Fig. 5: Always use a new gasket when replacing the throttle body



Click image to see an enlarged view

Fig. Fig. 6: Do NOT spray the throttle position sensor with cleaner; it may be damaged. Clean only the inside of the throttle body

  1. If the throttle position sensor was removed, refer to Driveability & Emissions Controls for the installation procedure.
  2.  
  3. Use a new gasket, and mount the throttle body to the manifold. Torque the bolts to 6.5 ft. lbs. (8.8 Nm.) in sequence, and then to 13-16 ft. lbs. (17.7-21.6 Nm.).
  4.  



Click image to see an enlarged view

Fig. Fig. 7: Proper torque of the throttle body bolts will ensure smooth operation. Follow the sequence shown

  1. Install and adjust the throttle cable and cruise control cable, if equipped.
  2.  

Check the throttle for smooth operation and make sure the bypass port is free from obstacles and is clean.

  1. Connect the electrical connectors and the hoses to the throttle body.
  2.  

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.

  1. Connect the air duct to the throttle body.
  2.  
  3. Connect the negative battery cable.
  4.  
  5. Start the engine, and check for air leaks and proper engine operation.
  6.  
  7. Adjust the idle speed as necessary.
  8.  

During every check, pay attention to hose connections, dipstick and oil filler cap for evidence of air leaks. Should you encounter any, take steps to correct the problem.

 
label.common.footer.alt.autozoneLogo