Hi everyone can someone help me i have a st200 it was put onto the diagnosis machine the other day to see if it had any faults as i am using alittle more fuel than usual and i have a slight missfire on idle. the computer has come up with knock sensor.I have found a cheap one on ebay that i am going to buy the problem is i dont have a clue where the sensor is if anyone has any ideas or pics i would be very greatfull cheers guys