Diagnostic Aids
- An engine analyzer is used to diagnose problems in secondary side of ignition system.
- Visually inspect engine compartment to ensure vacuum hoses and spark plug wires are properly routed and securely connected.
- Examine all wiring harnesses and connectors for insulation damage and burned, overheated, loose and broken conditions.
- Ensure battery is fully charged and all accessories are turned off during testing.
- Use an engine analyzer or lab scope and DIS Adapter (Rotunda 007-00044) in these testing procedures.
NOTE:
If this portion of diagnostic procedure is to provide accurate results, maintaining engine analyzer calibration is essential. Refer to equipment manual. If this is not available, an estimate of calibration can be made by connecting Spark Tester (D81P-6666-A) to a properly operating ignition system and measuring firing voltage of spark tester only. DO NOT include firing voltage of rotor-to-cap gap. Spark tester firing voltage should be approximately 28 k/volts.