Question
 

hey guys im not really a ford wiz but my inlaw has a 07 6.0L and it runs great but anytime u hit the throttle or let off the throttle it has a small whistle type noise but it is not turbo wine if any one could help me out it would be much appreciated

Do you notice a loss of power steering just momentarly?

no not at all it almost sounds like a intercooler boot with a pin hole leak but it runs great

probably coolant spraying out of the overflow tank. Does it sound kind of like a tea kettle?

No there was nothing spraying out under the hood but i did add about 1 gallon of coolant to it

Its defintly gotta go somewhere. Is it blowing white smoke?

No smoke at all even when you gas it just a little puff of black smoke

Come on, Some one help this guy out. You might pm big angry hillbilly. He is a tech and he knows his stuff.:humm:

Any performance Mods?

Well I would guess headgaskets. I'll bet the coolant is just being burnt off in small amounts and you dont notice it.