finnaly after a month and a half of having a non working nitro sport, i have solved my problem.
last wensday i went to the hobby shop to do the traxxas engine replacement plan (a large hit to my wallet. $150 after every thing) when i started talking to the guy he asured me that a new piston and sleeve will fix up my older version trx .15 as good as new (much nicer to my wallet. $30)
now i play the waiting game. its been 6 days. tommorow the part will be coming in and i will finaly be able to drive.
i think this was a good choise. now i can learn and become a better driver with this easy to drive. then later on i can use that saved money to buy a new car like a revo or a touring car.
hears the part that i ordered.
i will try and get some pics of my old piston up tonight.