I have a 2004 Ford Taurus DOHC and it makes a whistling noise when i accelerate and when it hits over ~3000 RPM. it has a loss of power from this. Replaced intake manifold gaskets all 12 of them and airmass sensor and the intake manifold was cleaned and new gaskets. new air intake boot. new egr valve and lines. new spark plugs and coils. possible cause/ fix?