The vents dont work now only the defroster. Im guesing some sort of vacum line my buddy missed? Also it sounds like a freakin supercharger. But that could be the new belt and tensioner on there now.

 

Mine whislted like a supercharger too after installing it, but it went away after just a few miles of driving. Not sure what it was.

Check the side of the intake to make sure all the vacuum lines are hooked up on both sides.

 

Passenger side of the manifold...theres two vac connections, one for pcv (top) one for vent vacume (right below). The vent vac line comes from the firewall not too far from there.

 

indy is dead on

 

I had the same problem on my truck there's a one-way vacuum check valve in the line by the plenum check that out and see if it's blowing both ways I replaced that and it fixed it

 

supercharger sound is the belt .. also could be the new tensioner (if it was the assy. and came with new pullies)

you can make it sound that way anytime you want.. just get get a can of some STP belt conditioner .. really sticky stuff.. makes the pullys grip harder on the belt

the sound will go away after the belt breaks in and warms up.