[cankp81]

I have a manual '96 V6, which has undergone repair at countless facilities over the years. Lately, whenever I shut the engine off, there is a whistling sound coming from the passenger firewall side of the engine compartment. I occassionally hear a softer version when I accelerate.

I don't think it's the brake booster, as the brake pedal is working fine (not too hard to push). It's also not the AC condensate dripping on the cat (annoying, but a totally different sound altogether).

The best way I can describe it a kids' plastic blow whistle (you know, with the plunger you pull out to change the tone).

While I have not noticed any performance related issues, I'm concerned about the noise. Any suggestions would be appreciated.

[Mustangdewd3.8]

How long does this whistleing last?

Do you have an upgraded intake? possible intake leak or vaccum leak?

[Venom810]

sounds like a CAI , do you have one installed on there ? my 01 with a bbk cold air intake use to do that when i shut the car off ....

[cankp81]

Actually, as far as I know my car is completely stock. The whistling sound lasts only for a second or two, and mind you, it also has about 185,000 miles on it. (It's been around the block!)

[Venom810]

Originally Posted by cankp81

Actually, as far as I know my car is completely stock. The whistling sound lasts only for a second or two, and mind you, it also has about 185,000 miles on it. (It's been around the block!)

well a cold air intake is pretty much noticable .... not sure what it would be

[kscoyote]

Originally Posted by cankp81

Actually, as far as I know my car is completely stock. The whistling sound lasts only for a second or two, and mind you, it also has about 185,000 miles on it. (It's been around the block!)

could be a vacuum leak in your AC gate system.