B&M Converter is bad

I bought a used but like new Snap-on dial back light that has all the bells and whistles for a super deal considering what they charge for them. Guess what? It's the most temperamental light I've had. If the engine misfires it scrambles the T light's brain box and I have to unhook it from power and re-hook it back up to reset it. Been tempted to see how far I can throw it a few times. Don't get me wrong, the options it has are great, when it works right... Get yourself a decent regular inductive light and mark your balancer and it'll work just fine.