saveme20

I have a 2001 mustang gt and i sounds like it has a vacuum leak and it goes in and out I tried to find it before and couldn't find anything but yesterday I found out where its coming from I guess it's some type of a valve right in front of the throttle body its rectangle and about an inch tall and 2 inches long. It sounds like it's opening and closing but I have no idea what its called and I'm guessing it not suppose to sound like that If any has had this problem or knows what it is PLEASE let me know.

mrtstang

I was going to say the pcv valve, but that's on the passanger side valve cover. Are you sure it's not coming from there?

masterofthepuppets99

helmholtz device?

saveme20

positive i guess ill go to ford and see what they say

saveme20

If you look below step 11 you will see a black rectangle box that attaches to the throttle body in the corner of the pic thats where the sound is coming from

saveme20

http://images.google.com/imgres?imgu...a%3DN%26um%3D1

pinto18

Have you done the rev modd by changing your gasket in your IAC ?? Which is what that black box is connected to. If so then i believe it should sound like that and its not a leak

03BottleFedGT

take off the black box and replace it with a hose you dont need it

Brute03

if you're hearing intermittent sucking noises around that "black box", then its more than likely just the IAC regulating the idle. pretty normal

rafacalz

What is the point of taking it off?