Well, I'm stumped!
It doesn't ping when the engine's cold. It'll ping when it's fully warmed up. It's not over the top, but you can hear it in the background at about 3/4th throttle, like going up a hill & such.
I've set the timing to 10° spot on..it advances.
My balancer looks fine
New EGR and ACT
New plugs, wires & fuel injectors
New PCV and cleaned PCV mesh
Separated plug wires 2 & 4 and 7 & 8 on wire looms
Not sure what it could be I hear possibilites
1: valve clatter
2: manifold cracks
3: vacuum leaks
I've no evidence to support any of those... 98% of time the car runs just fine...it's just those press the throttle moments...