OK guys I'm just trying to rule out all possibilities of knock..
I have a 2003 Pontiac with nearly 113,000 miles on her. At about 36,000 I decided to mod my gtp a bit and at that time I bought an extreme energy cam with push rods 130# springs lifters rollmaster double roller timing chain. Tog headers high flow catback cold air intake..
I was going to go even bigger but at that time fund's were a limiting factor..
I've had more than one member here comment on the valve springs being more than I needed..
Is it possible that the springs are to much spring and thus causing knock?
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