Well the car is a 1999 GTP, 165k ish miles, zzp small pully and computer remap (not sure on size, was installed already when I bought car.) In December was leaving work at 2am and the temperature was 10 deg F. Car was warmed up 10-15 min before I left work. I drove around town before I went home for 5 or so min. (I live 1 mile from work and like to charge battery up good in winter before turning car off.) Was 2 blocks from my house and it started chugging and didnt have much power. I limped it home and when I pulled into the drive way thecheck engine light came on then I turned the car off. Checked fluids and belts and they were all good. Had car towed and inspected. They said at had a bent over plug electrode causing a miss fire and check engine light to turn on. Bore camera pitcures showed a piece of metal stuck to the head. They wanted $2k to pull heads and inspect and put all together with a used supercharger. (They were thinking supercharger went out and engine ate something.) I had them put it back in my driveway for me to look at when I get time. I bought a 2008 Grand Prix and let the 1999 sit.
This weekend I finally pulled heads off and found 2 bad pistons. Not sure what caused it but seems weird how both pistons look broken exactly the same. See pictures.
