I am running MS for fuel only right now. Once I get my fuel map set up better I am going to add spark control. But my question is right now if I start to knock the ECU will retard the timing, once MS controls spark nothing will happen if knock occurs. Is anyone using a knock sensor or just listening for it and pretty much hoping it doesn't happen. I saw a circuit before and some said they built it on here but never posted whether it actually worked or not.