Sounds like an exhaust leak from the passenger side manifold. You sure you fixed it? Those gaskets are a PITA
coil packs, no wiresticking could also be one of the ignition wires falling off the plug...
running rich if they're chalky like that but at least its getting burnt and not building up too much...the gap is decent from what i remember, like around 48 possibly?? google factory specsi pulled 2 plugs last night on mine, the gaps appeared to be wayyyyy to big, does anyone know the propper gapping? also, when i pulled them they were black and almost chalky, normal?
I'm stumped. When mine was leaking, it was loud and embarrassing- and it did like you talked about, being proportionate with rpm.
Either way, getting under there with a breaker bar and tightening the living **** out of those two bolts wouldn't hurt. If that's not it, I'm sorry, but I'm clueless bro