Metro, Prizm 2000-2002

Spark Plugs

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Inspection & Gapping



Misfiring is a general term that applies to a poor running engine. With misfiring, the ignition spark is not igniting the air fuel mixture at the proper time. Before investigating other possible causes, inspect the spark plugs. Spark voltage should not reach ground before arcing across the gap at the tip of the spark plug. This leaves the air fuel mixture unburned, causing misfiring. Worn spark plugs or dirty spark plugs may operate well at idle speeds, but often fail at higher RPMs. Bad spark plugs are often responsible for power loss, poor fuel economy, speed loss, difficult starting or poor engine performance. You sometimes can clean, regap, and reuse spark plugs with less than the recommended amount of service. If there is any doubt about the serviceability of a spark plug, replace the spark plug.

Removal & Installation



1.0L Engine

NOTE
This engine is equipped with an aluminum cylinder head. Allow the engine to cool before removing spark plugs. Removing the spark plugs from an engine at operating temperature may damage the spark plug threads in the cylinder head. Also be sure to clean any dirt or debris from around spark plug holes prior to removing spark plugs.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the spark plug wires from the spark plugs. Before disconnecting, note the correct routing of the wires to ensure that the correct firing order is maintained.
  4.  
  5. Remove the spark plugs from the cylinder head.
  6.  
  7. Inspect the spark plugs for electrode wear, for carbon deposits, and for damage to the insulator.

    Click image to see an enlarged view

    Fig. Disconnect the spark plug wires (1) from the spark plugs (2) noting their correct locations first-Metro 1.0L engine

  8.  

To install:

  1. Be sure to use the type of spark plugs that are recommended by the dealer or stated in the vehicle owner-s manual.
  2.  
  3. Before installing each spark plug, be sure to set the gap to 1.0-1.1 mm (0.039-0.043 in).
  4.  
  5. Install the spark plugs to the cylinder head. Tighten the spark plugs to 21 ft. lbs. (28 Nm).
  6.  
  7. Correctly route the spark plug wires, and install the spark plug wires to the spark plugs.
  8.  
  9. Connect the negative battery cable.
  10.  

1.3L Engine

NOTE
This engine is equipped with an aluminum cylinder head. Allow the engine to cool before removing spark plugs. Removing the spark plugs from an engine at operating temperature may damage the spark plug threads in the cylinder head. Also be sure to clean any dirt or debris from around spark plug holes prior to removing spark plugs.

  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the ignition coil electrical connectors (4).
  4.  
  5. Carefully release the number 1 spark plug wire from the clip on the number 2-3 ignition coil.
  6.  
  7. Remove the 2 bolts (1) from each ignition coil.
  8.  
  9. Remove the number 1 spark plug wire and the number 1-4 ignition coil from the spark plugs.
  10.  
  11. Remove the number 2-3 ignition coil and the number 3 spark plug wire from the spark plugs.
  12.  
  13. Remove the spark plugs from the cylinder head. Inspect the spark plugs for electrode wear, for carbon deposits, and for damage to the insulator.

    Click image to see an enlarged view

    Fig. Remove the ignition coil packs from above to access the spark plugs-Metro 1.3L engine

  14.  

To install:

  1. Be sure to use the type of spark plugs that are recommended by the dealer or stated in the vehicle owner-s manual.
  2.  
  3. Before installing each spark plug, be sure to set the gap to 0.039-0.043 in. (1.0-1.1mm).
  4.  
  5. Install the spark plugs to the cylinder head. Tighten the spark plugs to 21 ft. lbs. (28 Nm).
  6.  
  7. Install the number 2-3 ignition coil and the number 3 spark plug wire to the spark plugs.
  8.  
  9. Install the number 4 spark plug wire and the number 1-4 ignition coil to the spark plugs.
  10.  
  11. Install the 2 bolts to each ignition coil.
  12.  
  13. Carefully secure the number 1 spark plug wire in the clip on the number 2-3 ignition coil.
  14.  
  15. Connect the ignition coil electrical connectors.
  16.  
  17. Connect the negative battery cable.
  18.  

1.8L Engine
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the 2 clips and the 2 nuts that secure the engine cover to the cylinder head cover.
  4.  
  5. Remove the engine cover from the cylinder head cover.
  6.  
  7. Disconnect the electrical connector from each ignition coil.
  8.  
  9. Remove the bolt securing each ignition coil from the cylinder head cover.
  10.  
  11. Remove each ignition coil from the cylinder head cover.
  12.  
  13. Remove the spark plugs from the cylinder head.
  14.  
  15. Inspect the spark plugs for electrode wear, carbon deposits and insulator damage.

    Click image to see an enlarged view

    Fig. Remove the engine cover (1) from the top of the cylinder head cover-Prizm



    Click image to see an enlarged view

    Fig. Remove each ignition coil from above to access the spark plugs-Prizm

  16.  

To install:

  1. Be sure to use the type of spark plugs that are recommended by the dealer or stated in the vehicle owner-s manual.
  2.  
  3. Before installing each spark plug, be sure to set the gap to 0.040-0.043 in (1.0-1.1mm) for a new spark plug or 0.047 in. (1.2mm) for a used spark plug.
  4.  
  5. Install the spark plugs to the cylinder head. Tighten the spark plugs to 13 ft. lbs. (18 Nm).
  6.  
  7. Install each ignition coil to the cylinder head cover.
  8.  
  9. Secure the ignition coils using the bolts and tighten to 80 inch lbs. (9 Nm).
  10.  
  11. Connect each ignition coil electrical connector.
  12.  
  13. Install the engine cover to the cylinder head cover. Secure the engine cover with the 2 clips and the 2 nuts. Tighten the nuts to 80 inch lbs. (9 Nm).
  14.  
  15. Connect the negative battery cable.
  16.  

 
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