Section 3 (Engine Controls - Tests W/Codes - EEC-IV): Summary
WARNING: This page is about a different car, the 1994 Ford Bronco. However, it is still accessible from the selected car via links, so may be relevant.
If no service code, Code 11 or 111 (pass code) displays, but driveability problem still exists, go to EEC-IV DIAGNOSIS BY SYMPTOM table. If driveability problem still cannot be located, proceed to the TESTS W/O CODES article for diagnosis by symptoms or intermittent diagnostic procedures.