TRQ 1A Ignition Coils Set Kit of 6 NEW for Chrysler Dodge Plymouth 3.2L 3.5L V6. Watch Our How To Video. Ignition Coil Features & Benefits. The ignition coil is a crucial part of your ignition system. It's function is to convert the 12 volt power of your vehicle's electrical system in to 35,000 or more volts. This produces a high intensity spark at the spark plug which then ignites the fuel in the cylinder. Coils in general will wear out over time. This will cause a misfire condition. In engines like this with one coil per cylinder you can diagnose a coil by putting a timing light...