Section 89 (Engine Self-Diagnostics - EEC-V - Bi-Fuel): Summary
WARNING: This page is about a different car, the 2002 Ford Pickup and 2002 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
If no DTC exists but driveability problem still exists, proceed to TROUBLE SHOOTING - NO CODES - EEC-V - BI-FUEL article for symptom diagnosis or intermittent diagnostic procedures.