My 944 has been off the road for a few weeks while I've been incorrectly diagnosing a non-start issue. The problem originally occurred while I was driving it, but suddenly died. I gave up on my own diagnosis and gave the car the local garage. The pictures appear to explain the problem!
I have had the dizzy cap and rotor off when doing a belt change 2 years ago, and I can only assume that I didn't notice the level of wear at the time. It looks like the wear has become so great that the spark was jumping a massive gap which added to heat until it destroyed itself! Oops. So how should I recognise wear in the future, and how long should these parts normally last?
