Section 133 (Engine Controls - Tests W/Codes - EEC-V (3.8L)): Summary
WARNING: This page is about a different car, the 1995 Ford Windstar. 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, proceed to TESTS W/O CODES - EEC-V article in the ENGINE PERFORMANCE section for symptom diagnosis or intermittent diagnostic procedures.