[David N.]

Yeah, for some reason it went away a day later. I have no idea. I'm guessing the intake got nudged when we tightened the screws, and somehow sealed up again. Or maybe the resonance flap was just sticking for a bit. Maybe pop the top and try tighting the screws on the intake seals, that's all I can think of.

You may also want to check air/oil seperator tho, I hear this can have similar symptoms. Run a search to be sure.

-David