What did you do to your NBS GMT800 Tahoe/Yukon Today?

[wyldhog]

I installed a oil catch can a bit ago and now I have this noise like an air leak. If I pinch one of the tubes it stops so pretty sure its from the can but everything is tight and when you put my hand around trying to "plug" the leak and listen for a change I can't. So my question is does yalls do this also?

I recorded the noise but the file is too big...

I think the hissing noise may be a common things with the catch cans. See if this helps:

 

[Scottydoggs]

my can dont make any noise. if you hear it thats a vac leak. if large enough the engine will surge at idle. spray some brake cleaner at it and the hose ends. if you have flammable spray the engine rpm will go up, non flammable it will bog.