I do need some technical help hehehe my sentro is 2004 about 95xxx driven. the problem is some times it switches of on its on. like em driving and remove foot from the race pedal and boom mostly it happens while dealing with the clutch . . . i went to many mechanics some tell to repair engine bla bla i dont think so. and i have cleaned my plugs all 4 of them, increased the rpm, and changed air filter still its switching of but reduced. like before all this my car was switching of after every time i leave the race pedal. any suggestions ?