AutoZone 1993 Chevrolet Truck K1500 Blazer 4WD 5.7L TBI 8cyl | Repair Guides | Engine Electrical | Ignition Timing | Adjustment | AutoZone.com

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    1993 Chevrolet Truck K1500 Blazer 4WD 5.7L TBI 8cyl

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    Nissan Car Altima & Sentra 1999-06

    Adjustment

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    Visually check the air cleaner, intake hoses, ducts, Exhaust Gas Recirculation (EGR) valve operation and electrical connections prior to the adjustment of the ignition timing. Correct or repair any problem as required. Be sure to inspect the throttle valve and the Throttle Position (TP) sensor for proper operation.

    1. Before servicing the vehicle, refer to the Precautions section.
    2.  
    3. Locate the timing marks on the crankshaft pulley and the front of the engine.
    4.  
    5. Clean the timing marks.

      Click image to see an enlarged view

      Fig. Point the timing light at the crankshaft pulley to see the timing marks-1.6L, 1.8L and 2.0L engines



      Click image to see an enlarged view

      Fig. The timing marks are located on the crankshaft pulley-2.4L engine

    6.  
    7. Using chalk or white paint, color the mark on the crankshaft pulley and the mark on the scale which will indicate the correct timing when aligned with the notch on the crankshaft pulley.
    8.  
    9. Attach a tachometer to the engine.
    10.  
    11. Attach a timing light to the engine, to No. 1 cylinder's ignition wire.
    12.  
    13. Check to be sure all of the wires clear the fan; start the engine and allow it to reach normal operating temperatures.
    14.  
    15. Block the front wheels and set the parking brake. Shift the transmission into NEUTRAL for automatic and manual transaxles; do not stand in front of the vehicle when making adjustments.
    16.  
    17. Perform the following procedures:
      1. Race the engine at 2000 rpm for about 2 minutes under a no-load condition; be sure all of the accessories are turned off.
      2.  
      3. Perform on board engine diagnostics and repair any fault code.
      4.  
      5. Race the engine 2-3 times under no-load, then run the engine it for 1 minute at idle.
      6.  
      7. Stop the engine and disconnect the Throttle Position (TP) sensor.
      8.  
      9. Race the engine at 2000 rpm for about 2 minutes under a no-load condition; be sure all of the accessories are turned OFF .
      10.  
      11. Run the engine at idle speed.
      12.  

    18.  
    19. Aim the timing light at the timing marks. If the marks on the pulley and the engine are aligned when the light flashes, the timing is correct. The correct ignition timing is as follows:


      1. 1.6L (GA16DE) & 1.8L (QG18DE): 6-10 degrees Before Top Dead Center (BTDC)
      2.  
      3. 2.0L (SR20DE): 13-17 degrees BTDC
      4.  
      5. 2.4L (KA24DE): 18-22 degrees BTDC
      6.  

    20.  
    21. Turn the engine OFF and remove the tachometer and the timing light. If the marks are not in alignment, proceed with the following steps.
    22.  
    23. Turn the engine OFF .
    24.  
    25. Loosen the bolts that secure the distributor just enough so it can be turned.
    26.  
    27. Start the engine. Keep the wires of the timing light clear of the cooling fan.
    28.  
    29. With the timing light aimed at the pulley and the marks on the engine, turn the distributor for the proper adjustment.
    30.  
    31. Race the engine 2-3 times under no-load, then run the engine it for 1 minute at idle.
    32.  
    33. Aim the timing light at the timing marks. If the marks on the pulley and the engine are aligned when the light flashes, the timing is correct.
    34.  
    35. Tighten the bolt that secures the distributor and recheck the timing.
    36.  
    37. Turn the engine OFF and remove the tachometer and the timing light.
    38.  
    39. Connect the TP sensor.
    40.  


    NOTE
    The ignition timing is not adjustable. If not within specifications, further diagnostic inspection is required. The following procedure is for viewing the ignition timing setting.

    Visually check the air cleaner, intake hoses, ducts, Exhaust Gas Recirculation (EGR) valve operation and electrical connections prior to the adjustment of the ignition timing. Correct or repair any problem as required. Be sure to inspect the throttle valve and Throttle Position (TP) sensor for proper operation.

    1. Before servicing the vehicle, refer to the Precautions Section.
    2.  
    3. Locate the timing marks on the crankshaft pulley and the front of the engine.
    4.  
    5. Clean the timing marks.
    6.  
    7. The ignition timing specifications are as follows:

      4-14 degrees BTDC for the 1.8L engine (2002 model only)
       
      13-23 degrees BTDC for the 1.8L engine (2003-2006 models with A/T)
       
      2-12 degrees BTDC for the 1.8L engine (2003-2006 models with M/T)
       
      10-20 degrees Before Top Dead Center (BTDC) for 2.5L and 3.5L engines
       

    8.  
    9. Using chalk or white paint, color the mark on the crankshaft pulley and the mark on the scale, which will indicate the correct timing when aligned with the notch on the crankshaft pulley.
    10.  
    11. Attach a tachometer to the engine.
    12.  
    13. Attach a timing light to the engine to number 1 cylinder ignition wire.
    14.  
    15. Turn all electrical equipment and accessories OFF .
    16.  
    17. Check to be sure all of the wires clear the fan, then, start the engine and allow it to reach normal operating temperatures.
    18.  
    19. Block the front wheels and set the parking brake. Shift the transmission into NEUTRAL for manual transmission and automatic transmissions. Do not stand in front of the vehicle when making adjustments.
    20.  
    21. Perform the following procedures:
      1. Race the engine at 2000 rpm for about 2 minutes under a no-load condition; be sure all of the accessories are turned OFF .
      2.  
      3. Perform on board engine diagnostics and repair any fault code.
      4.  
      5. Race the engine at 2000 rpm for about 2 minutes under a no-load condition.
      6.  
      7. Turn the engine OFF and disconnect the TP sensor.
      8.  
      9. Start and race the engine 2-3 times under no-load, then run the engine at idle speed.
      10.  

    22.  
    23. Aim the timing light at the timing marks. If the marks on the pulley and the engine are aligned when the light flashes, the timing is correct. Turn the engine OFF and remove the tachometer and the timing light. If the marks are not in alignment, proceed with the following steps.
    24.  
    25. Turn the engine OFF .
    26.  
    27. Check the Camshaft Position (CMP) sensor (PHASE), Crankshaft Position (CKP) sensor (REF) and CKP sensor (POS). Replace if necessary.
    28.  
    29. If the ignition timing is still not correct, substitute a known good Electronic Control Module (ECM).
      NOTE
      The ECM may be the cause of the problem but this is rarely the case.

    30.  
    31. Turn the engine OFF and remove the tachometer and the timing light.
    32.  

    1.6L, 2.0L & 2.4L Engines



    Visually check the air cleaner, intake hoses, ducts, Exhaust Gar Recirculation (EGR) valve operation and electrical connections prior to the adjustment of the ignition timing. Correct or repair any problem as required. Be sure to inspect the throttle valve and the Throttle Position (TP) sensor for proper operation.

    1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
    2.  
    3. Locate the timing marks on the crankshaft pulley and the front of the engine.
    4.  
    5. Clean the timing marks.

      Click image to see an enlarged view

      Fig. Point the timing light at the crankshaft pulley to see the timing marks-1.6L and 2.0L engines



      Click image to see an enlarged view

      Fig. The timing marks are located on the crankshaft pulley-2.4L engine

    6.  
    7. Using chalk or white paint, color the mark on the crankshaft pulley and the mark on the scale which will indicate the correct timing when aligned with the notch on the crankshaft pulley.
    8.  
    9. Attach a tachometer to the engine.
    10.  
    11. Attach a timing light to the engine, to No. 1 cylinder's ignition wire.
    12.  
    13. Check to be sure all of the wires clear the fan; start the engine and allow it to reach normal operating temperatures.
    14.  
    15. Block the front wheels and set the parking brake. Shift the transmission into NEUTRAL for automatic and manual transaxles; do not stand in front of the vehicle when making adjustments.
    16.  
    17. Perform the following procedures:
      1. Race the engine at 2000 rpm for about 2 minutes under a no-load condition; be sure all of the accessories are turned off.
      2.  
      3. Perform on board engine diagnostics and repair any fault code.
      4.  
      5. Race the engine 2-3 times under no-load, then run the engine it for 1 minute at idle.
      6.  
      7. Stop the engine and disconnect the Throttle Position (TP) sensor.
      8.  
      9. Race the engine at 2000 rpm for about 2 minutes under a no-load condition; be sure all of the accessories are turned OFF .
      10.  
      11. Run the engine at idle speed.
      12.  

    18.  
    19. Aim the timing light at the timing marks. If the marks on the pulley and the engine are aligned when the light flashes, the timing is correct. The correct ignition timing is as follows:


      1. 1.6L (GA16DE): 6-10 degrees Before Top Dead Center (BTDC)
      2.  
      3. 2.0L (SR20DE): 13-17 degrees BTDC
      4.  
      5. 2.4L (KA24DE): 18-22 degrees BTDC
      6.  

    20.  
    21. Turn the engine OFF and remove the tachometer and the timing light. If the marks are not in alignment, proceed with the following steps.
    22.  
    23. Turn the engine OFF .
    24.  
    25. Loosen the bolts that secure the distributor just enough so it can be turned.
    26.  
    27. Start the engine. Keep the wires of the timing light clear of the cooling fan.
    28.  
    29. With the timing light aimed at the pulley and the marks on the engine, turn the distributor for the proper adjustment.
    30.  
    31. Race the engine 2-3 times under no-load, then run the engine it for 1 minute at idle.
    32.  
    33. Aim the timing light at the timing marks. If the marks on the pulley and the engine are aligned when the light flashes, the timing is correct.
    34.  
    35. Tighten the bolt that secures the distributor and recheck the timing.
    36.  
    37. Turn the engine OFF and remove the tachometer and the timing light.
    38.  
    39. Connect the TP sensor.
    40.  

    1.8L, 2.0L & 2.4L Engines



    Visually check the air cleaner, intake hoses, ducts, Exhaust Gas Recirculation (EGR) valve operation and electrical connections prior to the adjustment of the ignition timing. Correct or repair any problem as required. Be sure to inspect the throttle valve and the Throttle Position (TP) sensor for proper operation.

    1. Before servicing the vehicle, refer to the Precautions section.
    2.  
    3. Locate the timing marks on the crankshaft pulley and the front of the engine.
    4.  
    5. Clean the timing marks.
    6.  
    7. Using chalk or white paint, color the mark on the crankshaft pulley and the mark on the scale which will indicate the correct timing when aligned with the notch on the crankshaft pulley.
    8.  
    9. Attach a tachometer to the engine.
    10.  
    11. Attach a timing light to the engine, to No. 1 cylinder's ignition wire.
    12.  
    13. Check to be sure all of the wires clear the fan; start the engine and allow it to reach normal operating temperatures.
    14.  
    15. Block the front wheels and set the parking brake. Shift the transmission intoNEUTRAL
    16.  
    17. Perform the following procedures:
      1. Race the engine at 2000 rpm for about 2 minutes under a no-load condition; be sure all of the accessories are turned off.
      2.  
      3. Perform on board engine diagnostics and repair any fault code.
      4.  
      5. Race the engine 2-3 times under no-load, then run the engine it for 1 minute at idle.
      6.  
      7. Stop the engine and disconnect the Throttle Position (TP) sensor.
      8.  
      9. Race the engine at 2000 rpm for about 2 minutes under a no-load condition; be sure all of the accessories are turnedOFF
      10.  
      11. Run the engine at idle speed.
      12.  

    18.  
    19. Aim the timing light at the timing marks. If the marks on the pulley and the engine are aligned when the light flashes, the timing is correct. The correct ignition timing is as follows:
      1. 1.8L (QG18DE) engine: 6-10 degrees Before Top Dead Center (BTDC)
      2.  
      3. 2.0L (SR20DE) engine: 13-17 degrees BTDC
      4.  
      5. 2.4L (KA24DE) engine: 18-22 degrees BTDC
      6.  

    20.  
    21. Turn the engineOFF
    22.  
    23. Turn the engineOFF
    24.  
    25. Loosen the bolts that secure the distributor just enough so it can be turned.
    26.  
    27. Start the engine. Keep the wires of the timing light clear of the cooling fan.
    28.  
    29. With the timing light aimed at the pulley and the marks on the engine, turn the distributor for the proper adjustment.
    30.  
    31. Race the engine 2-3 times under no-load, then run the engine it for 1 minute at idle.
    32.  
    33. Aim the timing light at the timing marks. If the marks on the pulley and the engine are aligned when the light flashes, the timing is correct.
    34.  
    35. Tighten the bolt that secures the distributor and recheck the timing.
    36.  
    37. Turn the engineOFF
    38.  
    39. Connect the TP sensor.
    40.  


      Click image to see an enlarged view

      Fig. Point the timing light at the crankshaft pulley to see the timing marks-1.8L and 2.0L engines



      Click image to see an enlarged view

      Fig. The timing marks are located on the crankshaft pulley-2.4L engine


    2.5L, 3.0L & 3.5L Engines




    NOTE
    The ignition timing is not adjustable. If not within specifications, further diagnostic inspection is required. The following procedure is for viewing the ignition timing setting.

    Visually check the air cleaner, intake hoses, ducts, Exhaust Gas Recirculation (EGR) valve operation and electrical connections prior to the adjustment of the ignition timing. Correct or repair any problem as required. Be sure to inspect the throttle valve and Throttle Position (TP) sensor for proper operation.

    1. Before servicing the vehicle, refer to the Precautions section.
    2.  
    3. Locate the timing marks on the crankshaft pulley and the front of the engine.
    4.  
    5. Clean the timing marks.
    6.  


    NOTE
    The ignition timing specification is 13-17 degrees Before Top Dead Center (BTDC).

    1. Using chalk or white paint, color the mark on the crankshaft pulley and the mark on the scale, that will indicate the correct timing when aligned with the notch on the crankshaft pulley.
    2.  
    3. Attach a tachometer to the engine.
    4.  
    5. Attach a timing light to the engine to number 1 cylinder ignition wire.
    6.  
    7. Turn all electrical equipment and accessoriesOFF
    8.  
    9. Check to be sure all of the wires clear the fan, then, start the engine and allow it to reach normal operating temperatures.
    10.  
    11. Block the front wheels and set the parking brake. Shift the transmission intoNEUTRAL
    12.  
    13. Perform the following procedures:
      1. Race the engine at 2000 rpm for about 2 minutes under a no-load condition; be sure all of the accessories are turnedOFF
      2.  
      3. Perform on board engine diagnostics and repair any fault code.
      4.  
      5. Race the engine at 2000 rpm for about 2 minutes under a no-load condition.
      6.  
      7. Turn the engineOFF
      8.  
      9. Start and race the engine 2-3 times under no-load, then run the engine at idle speed.
      10.  

    14.  


    NOTE
    The ignition timing specification is 13-17 degrees BTDC.

    1. Aim the timing light at the timing marks. If the marks on the pulley and the engine are aligned when the light flashes, the timing is correct. Turn the engineOFF
    2.  
    3. Turn the engineOFF
    4.  
    5. Check the Camshaft Position (CMP) sensor (PHASE), Crankshaft Position (CKP) sensor (REF) and CKP sensor (POS). Replace if necessary.
    6.  
    7. If the ignition timing is still not correct, substitute a known good Electronic Control Module (ECM).
    8.  


    NOTE
    The ECM may be the cause of the problem but this is rarely the case.

    1. Turn the engineOFF
    2.  

    3.0L Engine




    NOTE
    The ignition timing is not adjustable. If not within specifications, further diagnostic inspection is required. The following procedure is for viewing the ignition timing setting.

    Visually check the air cleaner, intake hoses, ducts, Exhaust Gas Recirculation (EGR) valve operation and electrical connections prior to the adjustment of the ignition timing. Correct or repair any problem as required. Be sure to inspect the throttle valve and Throttle Position (TP) sensor for proper operation.

    1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
    2.  
    3. Locate the timing marks on the crankshaft pulley and the front of the engine.
    4.  
    5. Clean the timing marks.
      NOTE
      The ignition timing specification is 13-17 degrees Before Top Dead Center (BTDC).

    6.  
    7. Using chalk or white paint, color the mark on the crankshaft pulley and the mark on the scale, that will indicate the correct timing when aligned with the notch on the crankshaft pulley.
    8.  
    9. Attach a tachometer to the engine.
    10.  
    11. Attach a timing light to the engine to number 1 cylinder ignition wire.
    12.  
    13. Turn all electrical equipment and accessories OFF .
    14.  
    15. Check to be sure all of the wires clear the fan, then, start the engine and allow it to reach normal operating temperatures.
    16.  
    17. Block the front wheels and set the parking brake. Shift the transmission into NEUTRAL for manual transmission and automatic transmissions. Do not stand in front of the vehicle when making adjustments.
    18.  
    19. Perform the following procedures:
      1. Race the engine at 2000 rpm for about 2 minutes under a no-load condition; be sure all of the accessories are turned OFF .
      2.  
      3. Perform on board engine diagnostics and repair any fault code.
      4.  
      5. Race the engine at 2000 rpm for about 2 minutes under a no-load condition.
      6.  
      7. Turn the engine OFF and disconnect the TP sensor.
      8.  
      9. Start and race the engine 2-3 times under no-load, then run the engine at idle speed.
        NOTE
        The ignition timing specification is 13-17 degrees BTDC.

      10.  

    20.  
    21. Aim the timing light at the timing marks. If the marks on the pulley and the engine are aligned when the light flashes, the timing is correct. Turn the engine OFF and remove the tachometer and the timing light. If the marks are not in alignment, proceed with the following steps.
    22.  
    23. Turn the engine OFF .
    24.  
    25. Check the Camshaft Position (CMP) sensor (PHASE), Crankshaft Position (CKP) sensor (REF) and CKP sensor (POS). Replace if necessary.
    26.  
    27. If the ignition timing is still not correct, substitute a known good Electronic Control Module (ECM).
      NOTE
      The ECM may be the cause of the problem but this is rarely the case.

    28.  
    29. Turn the engine OFF and remove the tachometer and the timing light.
    30.  

     
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