Ignition System Checks
WARNING: This page is about a different car, the 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Check for proper secondary ignition system voltage output using ONLY the Spark Tester (J 26792).
NOTE:
A higher secondary ignition voltage and more timing advance is required to operate the vehicle on CNG than on gasoline.
Check for proper operation of the Knock Sensor system.