My brother has a 95 ex civic with the greddy turbo kit(kit has been on for 30,000 miles car has a 160,000 on it). He was coming home from work the other night and was at high rpms and and about 12psi well he said the car poped and stuttered for a while and shut off. Pulled off the road and tried to start the car, it acted like it wanted to start but wouldnt. We started to tear it down the next day. The plug in cylinder #4 was missing the metal piece on the end so we took the head off and the head gasket was fine, we found a small piece of metal cylinder #3 but there was no scaring on any of the cylinder walls and all the pistons looked fine. We turned the crank and everything seemed to work normal. We put the car back together checked spark and check fuel everything is fine, there is combustion in the cylinders... I am pretty much at a lose right now of what would be the problem... Any ideas would be greatly appreciated. Thanks