its not knocking, and yes i had washed my motor and it start to come on, but since then, i had replaced the knock sensor and the wiring harness. and i dunno what my mechanic does. but also it could be a bad battery connection, and i had just put my system in right before this happened as well, and i put a extender on my positive terminal, imma take it off and move it to the jumper box. when the system hits i can see my volts drop a lil and that could also cause the knock sensor to come on cause its showing that it is losing volts