So I was driving today and all of a sudden my car started to putter and the check engine light came on. I immediately went to autozone to run the codes. It was cylinder misfire on 5. I got a new plug went home took of the cylinder pack and when I pulled it out the plug was inside of it. Did the plug some how come loose from when I changed all the plugs three months ago? I check the other three on the drivers side to make sure they weren't loose. But I put everything back together no more codes car is running fine seems to be good but I don't want that problem to happen again

 

a friend of mine had a similar problem, it turned out that when he had changed the plugs he did not use a torque wrench and over tightened one plug, stripping the threads on the plug hole, the plug would tighten, but pop out with the cylinder compression pressure.

it would pop out every now and then and got worse until it would not stay in at all.

He had to change the head.

 

Helicoil might've helped but let's hope it's not that problem!

 

Ouch!