found the reason yet Yea?
i put 91 octane gas in it a few times, and it actually did go away a bit, much smoother and quieter. does that mean its ping? or knock? What does that mean, i need to retard timing or what?
heres what im thinking could help:
new knock sensor
retard timing a bit
keep running 91 octane (not preferable)
gas pump is out/injectors are messed up
excessive carbon build up?
anyone know anything about what might help? how do i tell if my knock sensor isnt functioning properly?