No Initial Combustion
- Check ECM power source circuit (ignition keyed).
- Check ignition signal circuit. See SPARK TEST under IGNITION CHECKS in BASIC TESTING article in the ENGINE PERFORMANCE section.
- Check fuel pump control circuit. See CODE 78 in TESTS W/CODES - EXCEPT OBD-II article in the ENGINE PERFORMANCE section.
- Check spark plugs.
- Check fuel injector circuit.
- Check cold start injector circuit.