K I L O

iTrader: (5)

i went today to our local racetrack i didnt race my car or anything but i noticed a hissing sound when i was heading home it started when i stop at a red light and when i got in the gas not too much but regulary i get a hissing sound where the stereo is located at BTW my car is a 02 camaro SS A4 mods:LID,flows,cutoff,hypertech programmer has anyone had this problem or is it a problem u can hear it somewhat in the backpanel of the motor......is it something serious !!!!....any help will help!!!

thanks in advance

Big_Steve

It sounds like maybe you have a cracked line of some sort. Maybe an AC line. It makes sense because when you get on the gas a little it spins the AC compressor making a little more pressure in the lines. Has your AC got a little less cold? Thats about the only thing that I can think of.

ta12sec

iTrader: (3)

Im thinking either ac line or vacum leak at the blend door. If its ac youll know real soon it wont leak for very long.

wrencher

iTrader: (2)

You heat A/c mode select switch might have broke.

It uses vacuum to control duct selections.

K I L O

iTrader: (5)

actually i dont turn on my AC that much? is it bad

wrencher

iTrader: (2)

No that will have no effect, it sounds like the switch.
You are still under warranty.
W/defroster on the A/C will run.

K I L O

iTrader: (5)

i went out today to see whats up and i still get a hisssing and ratteling noise in the same spot i mention earlyer........it not a big deal right...i meean it can get fixed?

K I L O

iTrader: (5)

still getting a hisssing and ratteling nnoise WTF?is it something serious!!!!

cudaeh

iTrader: (2)

maby its your mastercylinder going... do you here the hissing when your at idel with your foot off the break or does it seem like the hissing starts when you put your foot on the break? if not it may be vacume lines... it kinda doesent make senc though vacume will increase as rpm increases... weard.. mastercylinder is the only thing i can think of that no one has already suggested.

K I L O

iTrader: (5)

well it doesnt do it when idle its when i get off my first gear off a stop...it happens somewhat in second gear BTW my car is a A4.

wrencher

iTrader: (2)

Where does this noise sound like it coming from??
Inside the car, or in the trans.
If it only makes a noise in a certain gear that would suggest a possible trans problem.
You need to be extremely descriptive in the symptoms to get any advice worth a crap.
What exactly is it doing & where does the noise emanate from?

ta12sec

iTrader: (3)

"You need to be extremely descriptive in the symptoms to get any advice worth a crap."

I think this should be required for anybody trying to get an answer about a problem

K I L O

iTrader: (5)

okay ones again the noise can be heared where the stereo is located at not a the shift **** or anything like that it comes from inside the air ducts where the stereo is located at now it does a hissing & rattleing sound when it jumps into second gear after that it stops from hissing & rattleing and like i said before this hissing can also be heared from the backwall of the motor when its idle and u floor it but not as much as u can hear it from inside when it kicks into second gear>>

NBM2001z28

iTrader: (43)

I have the same thing - btw last night my the silver canistor looking part of the A/C (sorry cant remember the name of it right now, i just worked a double) was full of condensation....

ta12sec

iTrader: (3)

the silver canistor looking part of the A/C = acumulator

LS1INSIDE

oh no!!! It's a RATTLESNAKE!!! j/k , Are you sure you didn't get any runs in that night?

K I L O

iTrader: (5)

hahahah naw man im sure

K I L O

iTrader: (5)

another thing i found out if the my transmission cooling line are leaking to ones that come from the radiador may these lines be causing for the hissing and rattling??

K I L O

iTrader: (5)

well best of things today no more hissing or rattling sound can be heared probably the engine was acting up but if happens again ima get it fixed thank for all your guyz help!!!

thanks in advance