Section 20 (Engine Controls - Tests W/Codes - EEC-IV (3.8L)): Summary
WARNING: This page is about a different car, the 1994 Mercury Sable, 1994 Mercury Cougar, 1994 Lincoln Continental, 1994 Ford Thunderbird, and 1994 Ford Taurus. 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 (3.8L) article in the ENGINE PERFORMANCE section for symptom diagnostic or intermittent diagnosis procedures.