Section 29 (Engine Controls - Tests W/Codes - EEC-IV (5.0L)): Summary
WARNING: This page is about a different car, the 1994 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
If no diagnostic trouble code is present but driveability problem still exists, see TESTS W/O CODES - EEC-IV (5.0L) article in the ENGINE PERFORMANCE section for symptom diagnostic or intermittent diagnosis procedures.