Not sure, my opinion though is if you have a 3.0 and haven't done the intake boot, just replace it so its one less problem area for a while. 15 bucks is not much money to try and eliminate one possible problem that might fix an issue, then if the whistling is still there, try the next solution, etc.

Survey says intake boot. Must have not looked hard enough the first time. Giddy up

I replaced my intake boot not long ago...
while its apart it's a good idea to clean the intake manifold and purge valve with cleaner..

looks now it's my disa valve

any write ups on swapping out this intake hose pipe?

mines ripped - gave me high pitched whistle, electrical tape confirmed it - looks like a job for a small handed octopus to get the clamps off.
THANKS - would have never figured this out on my own - even feared it was a wheel bearing...

mines ripped - gave me high pitched whistle, electrical tape confirmed it - looks like a job for a small handed octopus to get the clamps off.
THANKS - would have never figured this out on my own - even feared it was a wheel bearing...