axekick

iTrader: (15)

I need help identifying this noise. I posted over on LS1Tech but I thought I'd try to get some other ears on it. Here's the deal, I rebuilt this 6.0. Nothing crazy. It has a small cam and some new 799 heads. I'm running stock manifolds and cats for now. Actually the cats have been replaced by the PO. Anyway, this noise sounds like its coming from the front or from the intake when the hood is up. It comes and goes seemingly randomly and the strangest thing is that it doesn't seem to accellerate with the RPM. What the hell could it be?

This video was shot early in the morning so it's just dark but its from under the hood at idle. Please help me figure it out!

axekick

iTrader: (15)

I figured it out. I didn't put the hose back on the evap valve but I plugged it in so the noise was just the evap valve running with no hose hooked up to it.