Suzuki Samurai/Sidekick/Tracker 1986-1998 Repair Guide

Diagnosis and Testing

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IGNITION SPARK TEST



See Figures 1 and 2

  1. Detach the fuel injector wiring harness connector.
  2.  


CAUTION
If the fuel injector connector is not detached, combustible fuel may be emitted from the spark plug holes during the test, which can result in an explosion or fire.

  1. Perform the following steps for each of the four ignition coil/spark plugs, one at a time:
    1. Remove the ignition coil and spark plug.
    2.  
    3. Attach the ignition coil connector to the ignition coil, then insert the end of the spark plug into the ignition coil.
    4.  

  2.  


WARNING
Wearing rubber gloves and using insulated pliers to hold the ignition coil during this test, may help reduce the chance of electrocution.

  1. Ground the spark plug electrode against a metal part of the engine, as shown in the accompanying illustration.
  2.  
  3. While observing the spark plug electrodes, have an assistant crank the engine for 3-5 seconds with the ignition key. A strong blue-white spark should be observed between the spark plug electrodes. If no spark is observed, ensure that the plug is adequately grounded on a metal engine component. If no spark, or a weak yellowish spark is evident, inspect the spark plug, ignition coil and igniter for malfunctions.
  4.  

  1. Install the spark plug and ignition coil.
  2.  
  3. Repeat substeps 2a through 2d for each of the spark plugs.
  4.  



Click image to see an enlarged view

Fig. Fig. 1: Prior to performing the ignition spark test, always detach the fuel injector wiring harness connector



Click image to see an enlarged view

Fig. Fig. 2: With the spark plug inserted in the ignition coil, ground the plug electrode to a metal engine component (in this case the cylinder head cover) as shown

 
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