Miata 1990-1997

Distributor Cap & Rotor

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Inspection



Distributor Cap

Specific to:

Mazda Miata 1990-1997

  1. Wash the inside and outside surfaces of the cap with soap and water then dry it with compressed air.

    Click image to see an enlarged view

    Fig. Thoroughly inspect the cap for signs of damage, wear or corrosion, especially the electrical terminals (arrows)

  2.  
  3. Inspect the cap for cracks, broken or worn carbon button, or carbon tracks. Also inspect the cap terminals for dirt and corrosion.
  4.  
  5. Replace the cap if any of the above conditions are observed.
  6.  

Distributor Rotor

Specific to:

Mazda Miata 1990-1997

  1. Wash the rotor with soap and water then dry with it compressed air.

    Click image to see an enlarged view

    Fig. Inspect the rotor for signs of damage, wear or corrosion, especially the electrical terminals (arrows)

  2.  
  3. Inspect the rotor for cracks, carbon tracks, burns or damage to the blade or spring.
  4.  
  5. Replace the rotor if any of the above conditions are observed.
  6.  

Removal & Installation



Distributor Cap

Specific to:

Mazda Miata 1990-1997

  1. As a precaution, label all of the spark plug wires with their perspective cylinder number. Also, matchmark the cap to the distributor body.

    Click image to see an enlarged view

    Fig. To remove the distributor cap, first label the spark plug wires attached to the cap with their cylinder numbers

  2.  
  3. As necessary, remove any shrouds or air intake piping which may inhibit cap removal.
  4.  
  5. Loosen the cap hold-down screws.

    Click image to see an enlarged view

    Fig. Loosen the distributor cap attaching bolts. Use care to not drop and possibly loose them



    Click image to see an enlarged view

    Fig. Lift the cap, wires still attached, from the distributor

  6.  
  7. Remove the cap by lifting straight out to prevent damage to the rotor blade and spring.
    NOTE
    If the plug wires do not have enough slack to allow cap removal, confirm that they are properly labeled and remove them from the cap.

  8.  
  9. Installation is the reverse of the removal procedure. Note the position of the square alignment locator and tighten the hold-down screws to 18-23 inch pounds (2.0-2.6Nm)
  10.  

Distributor Rotor

Specific to:

Mazda Miata 1990-1997

  1. Remove the distributor cap.

    Click image to see an enlarged view

    Fig. To remove the distributor rotor, first remove the cap, then pull the rotor straight off the shaft

  2.  
  3. Pull straight out on the rotor to disengage it from the shaft and armature.
  4.  
  5. Installation is the reverse of the removal procedure. Align the locating boss on the rotor with the hole on the armature, then insure that it is fully seated on the shaft.
  6.  

 
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