I have this strange problem that after I drive my car hard (like driving really fast) or sometimes just normal driving, my clutch starts to get loose and eventually starts to get stuck to the ground. THEN, when I turn off the car and next day I go to turn it back on it wont start at all. NO POWER to the car at all. Sooo I open up my hood and touch one of the battery connecters and boom it works and my clutch is all good again. I bought the car used with intake, headers, and exhaust with the warranty still good (i got 26k miles). Im guessing I have a bad clutch and battery and the person before me raped the car. Any ideas? Also, if i bring my car to Nissan (I heard they have bad service) are they gonna give me a hard time since I am 17 and the car has aftermarket stuff?