ok so i bought a gsr integra and put the b in my car and its been fine all day then i noticed that the vtec is not kicking in well i checked the cil and its the knock sen. from what i have been told that the knock sen detects a knock in the motor and puts the computer into a kinda protect mood. but heres the thing the motor sounds great and has no knock to it at all so can a knock sen. go bad? it not what else could it be?