hissing noise

[ashtray1]

i've just had my stereo and undercar neon kit installed and have now got a hissing noise coming from somewhere when i accelerate. i think it may be coming from the gromit but am unsure, any ideas?

[aperfectcircle]

Check for snakes.

[jack.mc]

those snakes, they'll get you... Hmm I guess I don't really have anything to offer hrug:

[SweetWagon]

Hissing noise may be from speakers if power cables were ran with speaker wire?? but only if you had extra equipement put in such as an amplifier as nothing should have changed if you just has the head unit changed

[mouce]

Do you mean an electrical hiss, or a mechanical (wind?) hiss?

[ashtray1]

a wind hiss

[StoneX]

Like a vacuum hose or something?

I had a vacuum hose pop off one time and it did that when I accelerated, but it was in the engine bay, not in the dash.

[aperfectcircle]

When is this happening??

[ashtray1]

it happens under acceleration, i had some silcione put aound the gromit and it ha mostly fixed the problem but i am going to get holden to look at the vacuum hose at the next service

[MoSkA]

It's not alternator whine through the speakers?

Maybe the undercar neon's are messing with airflow causing a whisle, I remember on a ford I had, above 80kmph the drivers side mirror would have a loud whisle.
But if it happens with accelleration I would have thought alternator whine.
A mate of mine got his new deck installed in his magna, before- no whine, after uncontrollable and seemingly unfixable whine.

[teapot]

common cause for engine 'hissing' under acceleration is the purge hose. refer to this thread: my commodore hisses when i accelerate
did the trick for me.