The whole pertronix system is new. It was driving fine, until this suddenly started happening. And it cuts out at the same rpm too. We called pertronix about the coil and they said coils either work or don't work. We did not set up the rev limiter on the pertronix, but the engine was working/driving fine before this started happening. Ever since the engine was put in and running , about 2 1/2 of run time so far.