In this article I'll shed some light on how to test and diagnose a Ford (and Mercury) V-6 Ignition Coil Pack. You’ll learn how to test it on the car and without using a Scan Tool. The tests are fast and easy and I'll take you thru' the whole process step by step with photos, by explaining the do's and don'ts, and by teaching you some basic working theory all in plain English. Also and just as important... these tests will help you save money by correctly diagnosing the Ford Coil Pack as bad or eliminating it as the source of the problem (misfire or no-start). There are two other ignition system tutorials that might be of interest: If you need to test the 1.9L/2.0L 4 cylinder Ford Coil Packs, click here: How to Test FORD 4 Cylinder Coil Packs. Or if you need to test the 4.6L/5.4L V8 Coil-On-Plug Ford Ignition Coils, click here: How to Test Ford Coil-On-Plug (COP) Ignition