Quote Originally Posted by gtpinsc View Post
sooo i went WOT til i hit 110 mph, let off the gas check engine light started flashing... gave multiple codes for TPS, MAF and something else... anyway i got it back home slowly got to lookin at it and cylinder 6 spark plug gap had been closed.... what would cause this?
The flashing SES light means that there is multiple misfires. And that would be because of the smashed spark plug. But the spark plug probably got smashed because you shipped a piston. This means that you were probably running with too much knock, which caused the top lip of the #6 piston to chip off. This chip was then slammed against the spark plug and closed the gap. But your bigger problem is now you have a piston with a chip that is going to only get worse.