Intermittent Problem Diagnosis

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.

Intermittent diagnostic techniques help find and isolate root causes of intermittent faults associated with EEC system. The material is organized to help find fault and perform repair. The process of finding and isolating an intermittent fault, starts with recreating fault symptom, accumulating and comparing data to typical values and analyzing the results. Before proceeding, ensure the following:

Customary mechanical system tests and inspections DO NOT reveal a problem. Mechanical component problems can make an alternative fuel system react abnormally.
Technical Service Bulletins (TSBs) have been reviewed.
QUICK TEST and associated SYSTEM TESTS have been completed without finding a fault, and symptom is still occurring. See SELF-DIAGNOSTICS - EEC-V - BI-FUEL article.