318 has developed a miss?

Actually, if you're gonna go there, it would take an exhaust valve staying closed to make a pop through the carburetor. If it was the intake valve, you wouldn't get a pop, because that cylinder would not fire. The pop is the exhaust coming back through the intake and out the carburetor IF a closed exhaust valve is what the problem is. I was tryin to be optimistic. lol

I have to disagree with this.
If what you state is true, then why does a burned intake valve cause popping out the carb?
AND why does a lean condition cause popping out the carb, even if there isn't a burned or open valve (or closed ex valve)?

I already know the answers to the above questions, just wondering how you can say that.

OH NO, ALIENS GOT ROB!!! :toothy7:
That is the only explanation.