try having the computer scanned on it to see if you get any trouble codes from it that would be the first thing that needs to be done ,or you can go out and start buying parts for it until you accidentally find the problem with it and that will probably break your bank account,have you had it tuned up in the past two years or had any work done to it,since we cant see it we go on information you provide us with, which is very little on this one,good luck.
