I've had my 97 catera for about a year now, never really had any problems with it except for the minor things. BUT, when my wife was driving to work the car just shut down. I got it towed back home, got it started again but now it has a bad miss in #5 cyl. and it makes a real loud knock. Took the spark plug out and found it broken. I read here somewhere about a piston pin failing. My question is is this a common problem? Is it an easy fix? Or am I just going to have to sell it?