ok my 02 sentra has a brand new qr25 motor that we installed not even a year ago. after going home on leave from iraq, i admit i drove it a little too hard. not excesssive, but maybe too hard. anyway, one night, my car was revvig out at 2400 rpm. it kept doing it until i turned off the car and restrted it. so when i returned the car to my cousin for maintenence and such (i had to return to iraq) he said he took it to nissan cuz it was stallin on him and stuff. they told him that screws from something had became loose and sucked into the motor. now, nissan is declining to honor my warranty on the motor since i didnt have them install it. the engine alone was 2 gran and installation is ANOTHER 2 grand! it was an internal problem in the motor, and it had nothing to do with the installation. does anyone have any suggestions as to what i should do? i have a nice car, useless because of something that i had no control over. sumone please help me!!!