Would a cracked head cause an engine to run like it is only hitting on 3 an not all 4? I knew water was getting into the piston cause water was getting away an I could see it comming out of the tail pile. After it ran for a min or two it would run good.
After about 4 months it started to run like crap an I knew the head or head gasket was bad. That is why I got into the head changing.
Trouble is I don"t have a code machine.