Possible leaking intake manifold?

[GSXpower]

When I am going down the road at WOT I am running really rich, and I can't find any leaks anywhere else in my system. Boost pressure reads normal, but when I listen to my intake manifold at idle are you supose to be able to hear air rushing through the manifold? Or is that the sound of my leak? Could be a leaking gasket/ or maybe even a crack? I have looked and felt for the leak but can't find it. Thanks for any help.
Derek

 

[GSXpower]

Ok.... basicly what I really want to know is that at idle is it normal ot hear air rushing through the intake manifold? Or is that my leak? I don't have any DSM's in the area to listen to. Thanks

 

[L2RTSiAWD]

I couldn't tell with the engine on. But when I did an intake leak test I stuck my arm under the IM and could feel air blowing on it