Engine Controls - Trouble Shooting - No Codes - 7.3L Diesel: Introduction

NOTE: References to Econoline include Cutaway and RV Cutaway models. References to Pickup include Cab and Chassis models.

Diagnosis starts in SYMPTOM DIAGNOSIS. From SYMPTOM DIAGNOSIS, the technician will be guided through the appropriate diagnostic procedures.

Symptom checks can direct technician to malfunctioning component(s) for further diagnosis. A symptom should lead to a specific component or system test and/or adjustment. Use INTERMITTENT PROBLEM DIAGNOSIS to locate driveability problems that DO NOT occur when vehicle is being tested. These test procedures should also be used if a Continuous Memory (intermittent) DTC was present, but no problem was found during KOEO or KOER SELF-TEST.

NOTE: For specifications, see ON-VEHICLE ADJUSTMENTS - TRUCKS article or appropriate SERVICE & ADJUSTMENT SPECIFICATIONS article.

NOTE: Test procedures are written specifically for use with New Generation Star (NGS) tester. If a generic scan tool is used, ensure scan tool is certified OBD-II standard. A generic scan tool may not be capable of performing all necessary test functions.