I have an 03 gt. 4.6. Before when I would go WOT. From 1st gear it would rev to 6000 rpms before shifting and it would take off like a bullet. Now I have a loss of power. The engine sounds different like it's diverting air somewhere it shouldn't or something. That's the best way to describe the sound. And if I go WOT it doesn't accel nearly like it should and won't go over 4000 rpms. And the rpms hang there. Tried new MAF. New EGR and new TPS. All to no avail. I'm convinced it's an engine issue due to the way it sounds now. I checked all my shift solenoids with the snap on scan tool at my shop and there is no fault in any of them. No engine codes. And it does miss at high engine speeds. And sometimes at idle. Weird sound coming from intake also. But it's not consistent. Totally random. Need some onsite any help would be great. I'm tearing the valve covers off it a couple days when I have time. I hope i find a weak or broken spring. Seems like I'm getting valve float or one is just stuck. Thanks.
Jeremy
Jeremy