noticed a "whistling noise" the other day, that seems to become more aggressive as enging rpm/vehicle speed increase. Almost like a wind noise. I have elminated wind noise, definetely not it. Eliminated heat / a/c. Did replicate it once when in park and i played around under the hood, but couldn't find it. Checked all the vaccum lines i could get my hands on , everything seems tight. Noticed it especally in the colder temp....ie 30-40. Any ideas. It' s not consistant. Hasn't done it in a day or so, but just did it again. Hmmm. Nothing acting funny, no lights.

 

probally your throttlebody mine does it to

 

mine does that too,when its real cold
out ,mainly when i first start it .
Then it goes away when it warms up.

 

Mine does it too! It never did it before I had my I/C replaced so I looked for loose vacuum lines also. What is it? I thought it sounded like possibly a metalic rattle, maybe in one of the belt tensioners but I couldnt get the sound in the garage with the hood up?

 

never did it before i/c replacement either

 

New grills lately?

 

it's not wind noise.....comming from the engine compartment somewhere

 

Tampa

ive got billet upper lower, but it seems to do it
idleing when its real cold out sounds like its coming from
behind the radiator?

 

No new grill.
Looks like it may be I/C replacment related???

 

i'm gonna work on trying to pin point it next time it happens...possibly, an idler, maybe fan clutch?? It's quite annoying though. I'll keep everyone posted.