odd noise after turning car off

[DavidT]

When I turn the key off (the hood is OPEN), I hear what sounds like a pump shutting down... then immediately what sounds like a "sizzle". Any ideas?
Sorry for the lame description

 

[NotSoSlowSHO]

electric fan

 

[Wess]

You have a CAI, right? You're most likely hearing noises from the intake. The internal combustion engine is bascially an air pump, which explains these noises.

 

[DavidT]

You have a CAI, right? You're most likely hearing noises from the intake. The internal combustion engine is bascially an air pump, which explains these noises.

It is definitely from the intake... that is where the noise seems to be located at.
I guess you can call my setup CAI... with a panel K&N...

 

[shoteen95]

my mom's car makes a winding-down-jet-turbine sound when you turn it off..i think it sounds damn cool.

 

[Ian Macoomb]

It could be the SAI (secondary air pump). There was some talk on the V8 list about this a while back.

 

[99V8SHO]

my mom's car makes a winding-down-jet-turbine sound when you turn it off..i think it sounds damn cool.

Exactly what mine sounds like.

 

[Glue Maker]

Exactly what mine sounds like.

Mine makes that sound, as well as some "Ohh-WEE" sound that I think is coming from somewhere around the front passenger area.

 

[V6&V8SHO]

Normal

 

[wuzzzer]

Mine sounds like the Death Star preparing to fire! MWAHAHAHAHA

 

[Gen2Gen3WhatNxt]

my mom's car makes a winding-down-jet-turbine sound when you turn it off..i think it sounds damn cool.

Mine makes this exact same noise.

 

[ncfirefighter]

mine does too but i just say its the sound of her starting to relax after a hard run

 

[freshv6power]

Definitely the cooling fan. Try turning off the ignition with the ac running.

 

[MilTownSHO]

Mine both do the same thing also, I do not believe it to be the SAI pump though because I can hear it turnoff shortly after first starting the car.

 

[f150fan]

It's your electric fans. When I first bought my SHO 3 years ago I too heard this unknown noise. I had my brother shut the car off while I was under the hood finding the noise one hot summer day....and sure enough its the sound of the fans slowing to a stop. A normal noise...and it sounds cool too!!!