I can't tell really where its coming from, its not there when not idling, or under load
I've been under the car while its running and it sounds far away.
and from the engine bay, I can hear it, but I can't find it.

I've tried different fuels thinking it might be fuel knock or whatever.
I'm still on a new tank. so we'll see,

lets see pertinent info,
V6, KKN, Borla Duals, Ford wires 9mm, 10k on new plugs(motorcraft or autolight can't rememer) and DMD


99 Cougar V6 Tourmaline Green: MTX, KKM, Borla Dual...