Hyundai Coupes/Sedans 1986-1993 Repair Guide

Timing

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ADJUSTMENT



Excel with Feedback Carburetor

See Figures 1 and 2

  1. Place the vehicle in P or N , the emergency brake applied and the drive wheels blocked. Start the engine and let it reach normal operating temperature.
  2.  
  3. Connect a suitable tachometer and timing light to the engine. Turn OFF all accessories. Check the curb idle and adjust as necessary. The curb idle should be as follows:
    1. Manual Transmissions-600-800 rpm
    2.  
    3. Automatic Transmission-650-850 rpm
    4.  

  4.  
  5. If the timing marks are difficult to see, use chalk or a dab of paint to make them more visible.
  6.  



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Fig. Fig. 1: Timing marks-1986-89 Excel

  1. On the Canadian engines, disconnect the vacuum line from the distributor vacuum advance and plug the line.
  2.  
  3. Aim the timing light onto the timing marks and check the engine timing. If the timing is out of specifications, loosen the distributor mounting bolt and advance or retard the timing as necessary.
  4.  



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Fig. Fig. 2: Adjust the ignition timing by rotating the distributor housing-1986-89 Excel

  1. Once the proper timing has been reached, tighten the distributor mounting bolt and then recheck the timing again. The correct timing specifications are as follows:
    1. California-1-5 degrees BTDC
    2.  
    3. Federal-3-7 degrees BTDC
    4.  
    5. Canada-2-6 degrees BTDC
    6.  

  2.  
  3. When the timing has been set properly, recheck the curb idle speed and adjust as necessary.
  4.  
  5. When all final adjustments have been made, shut OFF the engine, reconnect all vacuum lines and remove all test equipment.
  6.  

Scoupe, Sonata and Excel with Multi-Point Fuel Injection (MPI)

See Figures 3, 4, 5 and 6

  1. Place the vehicle in P or N , the emergency brake applied and the drive wheels blocked. Start the engine and let it reach normal operating temperature.
  2.  
  3. Connect a suitable tachometer and timing light to the engine. Turn OFF all accessories. Check the curb idle and adjust as necessary to 650-850 rpm.
  4.  
  5. Stop engine and connect a jumper wire from the ignition timing adjustment connector (located at the rear of the engine compartment) to ground.
  6.  



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Fig. Fig. 3: Timing marks-1990-93 Excel, Elantra, Scoupe and Sonata



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Fig. Fig. 4: Grounding the ignition timing connector on the Sonata

  1. Start engine and allow to idle.
  2.  
  3. Loosen the distributor hold-down nut and turn distributor as needed to obtain a basic timing of 3-7 degrees BTDC.
  4.  



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Fig. Fig. 5: Adjusting the ignition timing on 2.0L engine Sonata and 1990-93 Excel. Turn the distributor clockwise to retard timing and counterclockwise to advance it



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Fig. Fig. 6: Adjusting the ignition timing on V6 engine Sonata. Turn the distributor clockwise to advance timing and counterclockwise to retard it

  1. Tighten distributor hold-down nut.
  2.  
  3. Stop engine and remove the jumper wire.
  4.  
  5. Start engine and recheck timing at idle. The correct ignition timing without ignition timing connector grounded is 10 degrees BTDC.
  6.  

Elantra

See Figure 7

  1. Place the vehicle in P or N , the emergency brake applied and the drive wheels blocked. Start the engine and let it reach normal operating temperature.
  2.  
  3. Connect a suitable tachometer and timing light to the engine. Turn OFF all accessories. Check the curb idle and adjust as necessary to 750-800 rpm.
  4.  
  5. Stop engine and connect a jumper wire from the ignition timing adjustment connector (located at the rear of the engine compartment) to ground.
  6.  
  7. Start engine and allow to idle.
  8.  
  9. Check the basic ignition timing and adjust as required. The basic timing should be 3-7 degrees BTDC.
  10.  
  11. If the timing is incorrect, loosen the crank angle sensor mounting nut and rotate the sensor until the correct timing is obtained.
  12.  



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Fig. Fig. 7: Adjust the timing on the Elantra by turning the crank angle sensor

  1. Tighten the crank angle mounting nut to 7-9 ft. lbs. (10-13 Nm).
  2.  
  3. Stop engine and remove the jumper wire.
  4.  
  5. Start engine and recheck timing at idle. The correct ignition timing without ignition timing connector grounded is 8 degrees BTDC.
  6.  

 
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