So I have a puch hpi. I first put it on my hobbit with adaptor, fired up fine and ran ok but the timing was always off according to a timing light. It would run or a few seconds and then die.
Recently put it on my e50 and it does the same thing. Will fire over for a few seconds and die. I did have enough time to check it with a timing light and now it's right where I want to be. Right before it dies the timing jumps.
I thought it was the box, just installed a fresh one and no luck. I bought this used, what's else could it be?
I have also tried swapping coils.