i have a 2005 4.6 4x4. i changed the vac solenoid, and the short part of the vac hose plus the check valve, the noise did not go away. so i check the vacume pressure and all seemed fine so i changed the iwe and the cv joint. just got done putting it all back together and the noise is still there... WHAT DO I DO NEXT????? please help i just dropped $200+ on this truck today and it didnt fix my problem... thanks