Originally Posted by Forney231
I put on a Banks cold air intake thinking this may correct the problem but it didn't. I believe the Throttle body is stock. Not sure how to check for leaks.
My CAI only whistles when its cold then goes away when warms up. Is there a spacer between the TB and the Intake Manifold? TB Spacers can cause the whistling also. I would make sure to eliminate the obvious and easy things first.
But my guess would still be a vacuum leak.