Engine Controls - Tests W/Codes - EEC-V (4.6L): Introduction

Perform all steps in BASIC TESTING - 4.6L article in ENGINE PERFORMANCE. If no fault is found while performing BASIC DIAGNOSTIC PROCEDURES, proceed with self-diagnostics. If no diagnostic trouble codes or only pass codes are found during self-diagnostics, proceed to TESTS W/O CODES - EEC-V (4.6L) article in ENGINE PERFORMANCE for diagnosis by symptom.