Diagnostic Aids
WARNING: This page is about a different car, the 2002 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.
Perform this test when instructed during SYMPTOM DIAGNOSIS. This test is intended to diagnose spark plugs and secondary ignition wires. The use of an engine analyzer is used to diagnose problems in secondary side of ignition system. Perform all PRELIMINARY INSPECTIONS before proceeding to testing.