System Diagnosis - Electronic Ignition

PRELIMINARY CHECKS:
Before attempting to diagnose the ignition system, a diagnostic circuit check should be performed.
Testing and Inspection

Verify no diagnostic trouble codes are stored in malfunction history and that the diagnostic system is functioning properly.

Verify customer complaint.

Perform a visual inspection of:
^ PCM grounds for being clean and tight.
^ Wiring for proper connections, pinches and cuts. Also check for proper routing of wires.
^ Vacuum hoses for splits, kinks and proper connections and routing.