Infiniti Car 1998-05

Adjustment

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2.0L Engine




NOTE
The engine should be in good mechanical condition and all electrical connectors and vacuum hoses connected before making this adjustment.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Start the engine and let it warm up to normal operating temperature.
  4.  
  5. Open the hood and run the engine under no load at about 2,000 rpm for about 2 minutes.
  6.  
  7. Perform Diagnostic Test Mode II and repair any causes of trouble codes as needed.
  8.  
  9. Run the engine under no load at 2,000 rpm for about 2 minutes. Rev the engine 2 or 3 times and let it idle for 1 minute.
  10.  
  11. TurnOFF
  12.  
  13. Adjust the timing to 13-17° BTDC by loosening the distributor mounting bolts and turning the distributor. When the timing is correct, tighten the mounting bolts and turn the engineOFF
  14.  
  15. Reconnect the TP sensor connector. Start the engine and check the ignition timing again.
  16.  


    Click image to see an enlarged view

    Fig. Crankshaft pulley and timing marks-2.0L engine



NOTE
The engine should be in good mechanical condition and all electrical connectors and vacuum hoses connected before making this adjustment.

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Start the engine and let it warm up to normal operating temperature.
  4.  
  5. Open the hood and run the engine under no load at about 2,000 rpm for about 2 minutes.
  6.  
  7. Perform Diagnostic Test Mode II and repair any causes of trouble codes as needed.
  8.  
  9. Run the engine under no load at 2,000 rpm for about 2 minutes. Rev the engine 2 or 3 times and let it idle for 1 minute.
  10.  
  11. Turn OFF the engine and disconnect the Throttle Position (TP) sensor connector. Connect a timing light to the No. 1 spark plug wire. Start the engine.
  12.  
  13. Adjust the timing to 13-17° BTDC by loosening the distributor mounting bolts and turning the distributor. When the timing is correct, tighten the mounting bolts and turn the engine OFF .
  14.  
  15. Reconnect the TP sensor connector. Start the engine and check the ignition timing again.

    Click image to see an enlarged view

    Fig. Crankshaft pulley and timing marks-2.0L engine

  16.  


NOTE
The engine should be in good mechanical condition and all electrical connectors and vacuum hoses connected before making this adjustment.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Start the engine and let it warm up to normal operating temperature.
  4.  
  5. Open the hood and run the engine under no load at about 2,000 rpm for about 2 minutes.
  6.  
  7. Perform Diagnostic Test Mode II and repair any causes of trouble codes as needed.
  8.  
  9. Run the engine under no load at 2,000 rpm for about 2 minutes. Rev the engine 2 or 3 times and let it idle for 1 minute.
  10.  
  11. Turn OFF the engine and disconnect the Throttle Position (TP) sensor connector. Connect a timing light to the No. 1 spark plug wire. Start the engine.
  12.  
  13. Adjust the timing to 13-17° BTDC by loosening the distributor mounting bolts and turning the distributor. When the timing is correct, tighten the mounting bolts and turn the engine OFF .
  14.  
  15. Reconnect the TP sensor connector. Start the engine and check the ignition timing again.

    Click image to see an enlarged view

    Fig. Crankshaft pulley and timing marks-1998-2001 2.0L engine

  16.  


NOTE
The engine should be in good mechanical condition and all electrical connectors and vacuum hoses connected before making this adjustment.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Start the engine and let it warm up to normal operating temperature.
  4.  
  5. Open the hood and run the engine under no load at about 2,000 rpm for about 2 minutes.
  6.  
  7. Perform Diagnostic Test Mode II and repair any causes of trouble codes as needed.
  8.  
  9. Run the engine under no load at 2,000 rpm for about 2 minutes. Rev the engine 2 or 3 times and let it idle for 1 minute.
  10.  
  11. Turn OFF the engine and disconnect the Throttle Position (TP) sensor connector. Connect a timing light to the No. 1 spark plug wire. Start the engine.
  12.  
  13. Adjust the timing to 13-17° BTDC by loosening the distributor mounting bolts and turning the distributor. When the timing is correct, tighten the mounting bolts and turn the engine OFF .
  14.  
  15. Reconnect the TP sensor connector. Start the engine and check the ignition timing again.

    Click image to see an enlarged view

    Fig. Crankshaft pulley and timing marks-2002 2.0L engine

  16.  

3.0L & 4.1L Engines




NOTE
The engine should be in good mechanical condition and all electrical connectors and vacuum hoses attached before making this adjustment.

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Start the engine and let it warm up to normal operating temperature.
  4.  
  5. Open the hood and run the engine under no load at about 2,000 rpm for about 2 minutes.
  6.  
  7. Perform Diagnostic Test Mode II and repair any causes of trouble codes as needed.
  8.  
  9. Run the engine under no load at 2,000 rpm for about 2 minutes. Rev the engine 2 or 3 times and let it idle for 1 minute.
  10.  
  11. Turn OFF the engine and disconnect the Throttle Position sensor connector. Remove the No. 1 ignition coil. Connect the coil to the spark plug using a spare piece of high-tension wire so you have a place to connect your timing light. Start the engine.

    Click image to see an enlarged view

    Fig. Connect the No. 1 ignition coil to the spark plug with the spare piece of high-tension wire-4.1L engine shown



    Click image to see an enlarged view

    Fig. Location of timing marks-3.0L engine

  12.  
  13. Run the engine under no load at 2,000 rpm for about 2 minutes. Rev the engine 2 or 3 times and let it idle.
  14.  
  15. Check the ignition timing and adjust if needed.
  16.  
  17. The correct ignition timing is as follows:
    1. Correct ignition timing for 3.0L engines is 8-12° BTDC.
    2.  
    3. Correct ignition timing for the 4.1L engine is 13-17° BTDC.

      Adjustment is made by loosening the screws and turning the Camshaft Position (CMP) sensor until the mark on the crankshaft pulley is pointing at 10° BTDC. Tighten the mounting screws and confirm ignition timing has not changed.
       
      Turn the engine OFF and connect the TP sensor connector.

      Click image to see an enlarged view

      Fig. Location of timing marks-4.1L engine

       

    4.  

  18.  


NOTE
The engine should be in good mechanical condition and all electrical connectors and vacuum hoses attached before making this adjustment.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Start the engine and let it warm up to normal operating temperature.
  4.  
  5. Open the hood and run the engine under no load at about 2,000 rpm for about 2 minutes.
  6.  
  7. Perform Diagnostic Test Mode II and repair any causes of trouble codes as needed.
  8.  
  9. Run the engine under no load at 2,000 rpm for about 2 minutes. Rev the engine 2 or 3 times and let it idle for 1 minute.
  10.  
  11. Turn OFF the engine and disconnect the Throttle Position sensor connector. Remove the No. 1 ignition coil. Connect the coil to the spark plug using a spare piece of high-tension wire so you have a place to connect your timing light. Start the engine.

    Click image to see an enlarged view

    Fig. Connect the No. 1 ignition coil to the spark plug with the spare piece of high-tension wire-4.1L engine shown



    Click image to see an enlarged view

    Fig. Location of timing marks-3.0L engine

  12.  
  13. Run the engine under no load at 2,000 rpm for about 2 minutes. Rev the engine 2 or 3 times and let it idle.
  14.  
  15. Check the ignition timing and adjust if needed.
  16.  
  17. The correct ignition timing is as follows:
    1. Correct ignition timing for 3.0L engines is 8-12° BTDC.
    2.  
    3. Correct ignition timing for the 4.1L engine is 13-17° BTDC.

      Adjustment is made by loosening the screws and turning the Camshaft Position (CMP) sensor until the mark on the crankshaft pulley is pointing at 10° BTDC. Tighten the mounting screws and confirm ignition timing has not changed.
       
      Turn the engine OFF and connect the TP sensor connector.

      Click image to see an enlarged view

      Fig. Location of timing marks-4.1L engine

       

    4.  

  18.  

3.0L, 3.5L & 4.1L Engines




NOTE
The engine should be in good mechanical condition and all electrical connectors and vacuum hoses attached before making this adjustment.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Start the engine and let it warm up to normal operating temperature.
  4.  
  5. Open the hood and run the engine under no load at about 2,000 rpm for about 2 minutes.
  6.  
  7. Perform Diagnostic Test Mode II and repair any causes of trouble codes as needed.
  8.  
  9. Run the engine under no load at 2,000 rpm for about 2 minutes. Rev the engine 2 or 3 times and let it idle for 1 minute.
  10.  
  11. TurnOFF
  12.  
  13. Run the engine under no load at 2,000 rpm for about 2 minutes. Rev the engine 2 or 3 times and let it idle.
  14.  
  15. Check the ignition timing and adjust if needed.
  16.  
  17. The correct ignition timing is as follows:
    1. Correct ignition timing for 3.0L and 3.5L engines is 8-12° BTDC.
    2.  
    3. Correct ignition timing for the 4.1L engine is 13-17° BTDC.
    4.  
    5. Adjustment is made by loosening the screws and turning the Camshaft Position (CMP) sensor until the mark on the crankshaft pulley is pointing at 10° BTDC. Tighten the mounting screws and confirm ignition timing has not changed.
    6.  
    7. Turn the engineOFF
    8.  

  18.  


    Click image to see an enlarged view

    Fig. Connect the No. 1 ignition coil to the spark plug with the spare piece of high-tension wire-4.1L engine shown



    Click image to see an enlarged view

    Fig. Location of timing marks-3.0L and 3.5L engines



    Click image to see an enlarged view

    Fig. Location of timing marks-4.1L engine


3.5L Engine




NOTE
The engine should be in good mechanical condition and all electrical connectors and vacuum hoses attached before making this adjustment.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Start the engine and let it warm up to normal operating temperature.
  4.  
  5. Open the hood and run the engine under no load at about 2,000 rpm for about 2 minutes.
  6.  
  7. Perform Diagnostic Test Mode II and repair any causes of trouble codes as needed.
  8.  
  9. Run the engine under no load at 2,000 rpm for about 2 minutes. Rev the engine 2 or 3 times and let it idle for 1 minute.
  10.  
  11. Turn OFF the engine and disconnect the Throttle Position sensor connector. Remove the No. 1 ignition coil. Connect the coil to the spark plug using a spare piece of high-tension wire so you have a place to connect your timing light. Start the engine.

    Click image to see an enlarged view

    Fig. Location of timing marks-3.5L engine

  12.  
  13. Run the engine under no load at 2,000 rpm for about 2 minutes. Rev the engine 2 or 3 times and let it idle.
  14.  
  15. Check the ignition timing and adjust if needed (Refer to Engine Tune-Up Specifications at beginning of chapter for proper settings; always defer to timing settings on tag under hood if different)
  16.  
  17. Adjustment is made by loosening the screws and turning the Camshaft Position (CMP) sensor until the mark on the crankshaft pulley is pointing at 10° BTDC. Tighten the mounting screws and confirm ignition timing has not changed.
  18.  
  19. Turn the engine OFF and connect the TP sensor connector.
  20.  

4.5L Engines





The ignition timing is controlled by the ECM and is not adjustable. With all electrical accessories off, wheels in the straight ahead position, the ignition timing is 7-17 degrees BTDC.
 

  1. The ignition timing is controlled by the ECM and is not adjustable. With all electrical accessories off, wheels in the straight ahead position, the ignition timing is 7-17 degrees BTDC.
  2.  

 
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