car exhaling!!

[plasmid2]

G'day again,

I posted a thread a couple of days ago in regards to a 'whining' 'moaning' sound from the vx. Whilst investigating this problem I seemed to have discovered possibly another.

The only way I can describe it is that when I switch the engine off it seems to make an 'exhale' sound. Almost like it's 'breathing' out. It lasts maybe 1 second!! I have never noticed it before. Is this normal.

The car is fairly stock apart from exhaust, extractors, K&N air filter, and dual fuel.

I gave the air filter and throttle body a clean the other day. Could it be related?

Thanks.

[dirt drifter]

i've had a vr and vs (both 5.0's) with K&N filters and CAI setups that did the exhale thing every time i shut them down, both cars ran well, never gave me any engine trouble so i can only assume its a normal thing

[WogBoyz]

has anything else changed like power loss, rough running ect

[Thomas1]

I had a cracked brake booster which would make a hissing sound with the car off as the air escaped from it.

[INNAWE]

it sounds like it is the induction noise. This happens on all cars some more then others. You said you have a K&N filter, this would make it more noticable. If you are ever near a V8 listen to it when it turns off.

[whitey152]

it tend to happen to people with pod filters more from cars with pods that i hear

[plasmid2]

Thanks guys. The car runs fine. Like I said I recently gave the filter and the throttle body a clean and both were pretty dirty. I think it might be the induction sound.

Cheers.

[delcowizzid]

the compressed air in at least one cylinder has to escape somewhere that is what the noise is just the pressure bleeding out