I have a 94 3.4l that has started knocking oils good and i replaced the injectors thinking that they where bad and knocking but after i replaced them its still there and it sounds like its coming form the top of the motor but i cany really track the source of it any help would be greatful so i can get me car back on the road

 

is it a knock or a tick? is it knocking all the time or only certain times?