knocking?

when my engine is running normally, the head makes like a clicking sound. is this kncoking? what can i do to make it more smooth. i thought running 91 oct fuel would help but nothin yet.

lifter sticking, could disassemble the head and de-gunk it or live with it.

try doing a valve adjusment

when was the last time you did that?

if its running shitty it may also be a plug wire arcing

i havent had a valve adjustment like ever i think. i also heard it could be carbon build up?. as for it performance wise some days its bad some days its not. thanks for the imput guys!!! its helping