Wind tunnel in cold air intake

[kware1]

just had an engine swap recently and trying to work out a few bugs. there is a loud sucking sound coming from the intake. it sounds like a wind tunnel pulling in air. it comes and goes with a slight fluctuation in rpms when it happens. not pulling a check engine code. just sounds nasty. Any idea about what this could be?

 

[Joe Dirt]

Make sure all of the intake tube clamps are tightened.

 

[kware1]

yes I did that, but in my search I found info about the idle air control valve. Seems this could be cause of of noise according to some posts. I'll try to clean that in addition to making sure the by pass tube is good and tight. I'm finding the guy swapped my engine left a few things disconnected. Guys that's why one guy wanted to charge $1500 and my guy only $600. Get what you pay for I guess.