Engine Controls - Basic Testing 4.6L: Summary

If no faults were found while performing BASIC DIAGNOSTIC PROCEDURES, proceed to appropriate article:

• For Grand Marquis, see TESTS W/CODES - GASOLINE.
• For Town Car, see TESTS W/CODES .

If no fault codes are found in self-diagnostics, proceed to TESTS W/O CODES - GASOLINE article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.