Re: Miss Fire!!
First you need to see if you have a nice blue spark to that cylinder. If you do I would say you cracked the block on number 4 by the valves. Number 4 gets hotter than 1,2. If it is cracked you will get water on the plug which will stop it from firing. Because you said it ran ok until it got hot, it most likely has some thing to do with getting real hot. It won't be the valve springs.
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