Chrysler Colt/Vista 1990-1993 Repair Information

Ignition Timing

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ADJUSTMENT



1.5L, 1.8L, 2.4L SOHC Engines

See Figures 1 through 6

  1. Apply the parking brake and block the wheels. Run the engine until it reach operating temperature.
  2.  
  3. Make certain all lights, cooling fan and accessories are OFF .
  4.  
  5. Position the steering wheel in straight ahead position and the gear selector lever in P or N .
  6.  
  7. Connect a timing light to the engine.
  8.  
  9. On 1.8L engine, insert a paper clip into the CRC filter connector (3-pole connector, 0.5-W cable). On 1.5L and 2.4L SOHC engines, insert a paper clip from behind the connector.
  10.  
  11. Connect a tachometer to the inserted clip. Do not separate the connector.
  12.  
  13. Check the curb idle speed. Should be 650-850 rpm (1.5L engine), 600-800 rpm (1.8L engine).
  14.  
  15. Stop the engine and jumper the terminal for ignition-timing adjustment to ground.
  16.  
  17. Start and run the engine at curb idle speed.
  18.  
  19. Check the basic ignition timing and adjust, if necessary. Basic ignition timing should be 5 degrees BTDC.
  20.  
  21. If the timing is not within specification, loosen the distributor hold-down bolt and turn the distributor to bring the timing within specs.
  22.  
  23. Tighten the hold-down bolt after adjustment. Recheck the timing and adjust if necessary.
  24.  
  25. Stop the engine and unground the ignition timing connector.
  26.  

Actual ignition timing may vary, depending on the control mode of the engine control unit. In such case, recheck the basic ignition timing. If there is no deviation, the ignition timing is functioning normally.



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Fig. Fig. 1: Loosening the distributor holddown bolt



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Fig. Fig. 2: Tachometer hookup

  1. Start the engine and run at curb idle. Check the actual ignition timing. Actual ignition timing should be 10 degrees BTDC for 1.5L and 1.8L engines, 8 degrees BTDC for 2.4L engine.
  2.  

At altitudes, more than approximately 2,300 ft. (701m) above sea level, the actual ignition timing is further advanced to ensure good combustion.



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Fig. Fig. 3: Timing marks are on a scale attached to the front cover. A notch is provided on the pulley rim. It's a good idea to highlight the notch with a dab of white paint



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Fig. Fig. 4: Paper clip positioning



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Fig. Fig. 5: Jumper wire installation



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Fig. Fig. 6: Rotating the distributor

1.6L and 2.0L DOHC Engines
  1. Apply the parking brake and block the wheels. Run the engine until it reach operating temperature.
  2.  
  3. Make certain all lights, cooling fan and accessories are OFF .
  4.  
  5. Position the steering wheel in straight ahead position and the gear selector lever in P or N .
  6.  
  7. Connect a timing light to the engine.
  8.  
  9. On 1.6L engine, insert a paper clip from behind the connector. On 2.0L engine, insert a paper clip into the engine revolution speed detection terminal (in engine compartment) and connect a tachometer to the inserted clip.
  10.  
  11. Check the curb idle speed. Should be 650-850 rpm.
  12.  
  13. Stop the engine and jumper the terminal for ignition-timing adjustment to ground.
  14.  
  15. Start and run the engine at curb idle speed.
  16.  
  17. Check the basic ignition timing and adjust, if necessary. Basic ignition timing should be 5 degrees BTDC.
  18.  
  19. If the timing is not within specification, loosen the crank angle sensor retaining nut and turn the crank angel sensor to bring the timing within specs.
  20.  
  21. Tighten the sensor retaining nut after adjustment. Recheck the timing and adjust if necessary.
  22.  
  23. Stop the engine and unground the ignition timing connector.
  24.  
  25. Start the engine and run at curb idle. Check the actual ignition timing. Actual ignition timing should be 8 degrees BTDC.
  26.  

Actual ignition timing may vary, depending on the control mode of the engine control unit. In such case, recheck the basic ignition timing. If there is no deviation, the ignition timing is functioning normally.At altitudes, more than approximately 2,300 ft. (701m) above sea level, the actual ignition timing is further advanced to ensure good combustion.

 
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