hissing from rear - vacuum leak?

[Jackstand]

i have plugged the two ports coming off the rear of the intake by the map sensor but still sounds like a leak back there? is there a port im missing?

thanks

 

[lt4malibu]

:-({|=

 

[labelblack68]

check the map sensor? do you have any other pics of the car in you avatar

 

[Jackstand]

I guess the hissing was normal, it sounded excessive to me after hearing a stock camaro its about the same.

more my my car
http://smg.photobucket.com/albums/v616/jackstand/mycar/11%20updates/

 

[B.G.]

more my my car
http://smg.photobucket.com/albums/v616/jackstand/mycar/11%20updates/

After seeing your car, I assure you i can help, But I'll need you to drop it off so i can drive it for a while dancin_banana.gif , you know, probably a few weeks, And along with that I'll have properly test the car at different speeds, mainly excessive speeds. I'll do that for free. What a bargain
Just tryin' to help
My .02