94 Cutlass Supreme - whistles while driving

I'm getting a whistling sound when driving in my '94 Cutlass with the 3100
V6. It sounds like an air leak and I just can't find it. I've pushed and
pulled on every air hose I can find with no results. The whistling seems to
happen only when there's no throttle input after accelerating, until the
engine slows back down and goes as follows:

- The whistle almost sounds like a tea kettle.
- It only happens if I'm accelerating and let off the gas, lifting from a
steady speed results in no whistle.
- The whistle goes on for 2-3 seconds and stops, starting with a high pitch
and lowering.
- If I hit the gas again while it's whistling, it immediately stops.
- The whistling is louder if the A/C is running.
- The sound is coming from outside of the car and isn't an under-dash air
leak. You can't really hear the whistle unless a window is open.
- This can't be duplicated either by revving in neutral or in gear with your
foot on the brake, the car must be moving.

TIA for any help.

Chris wrote:
> I'm getting a whistling sound when driving in my '94 Cutlass with the 3100
> V6.

Okay, Chris, if you are a good-looking woman, I think I can explain it ...

On 2005-08-15 said:
>Newsgroups: rec.autos.tech
>Chris wrote:
>> I'm getting a whistling sound when driving in my '94 Cutlass with
>>the 3100 V6.
>Okay, Chris, if you are a good-looking woman, I think I can explain
>it ...
Or the car likes the tune but doesn't know the words... [Heh]


Tom Willmon
near Mountainair, (mid) New Mexico, USA

Anybody wanna go for Krustyburgers?

Net-Tamer V 1.12.0 - Registered

Chris wrote:
> I'm getting a whistling sound when driving in my '94 Cutlass with the 3100
> V6. It sounds like an air leak and I just can't find it. I've pushed and
> pulled on every air hose I can find with no results. The whistling seems to
> happen only when there's no throttle input after accelerating, until the
> engine slows back down and goes as follows:
>
> - The whistle almost sounds like a tea kettle.
> - It only happens if I'm accelerating and let off the gas, lifting from a
> steady speed results in no whistle.
> - The whistle goes on for 2-3 seconds and stops, starting with a high pitch
> and lowering.
> - If I hit the gas again while it's whistling, it immediately stops.
> - The whistling is louder if the A/C is running.
> - The sound is coming from outside of the car and isn't an under-dash air
> leak. You can't really hear the whistle unless a window is open.
> - This can't be duplicated either by revving in neutral or in gear with your
> foot on the brake, the car must be moving.
>
> TIA for any help.

A very small vacuum leak in terms of surface area in a strong vacuum
area such as near an intake manifold runner could produce a whistling
sound that is more pronounced on deceleration. Sure sounds like an
intake gasket to me. Well, actually I can't hear it, but that's what
it *seems* like.

Toyota MDT in MO

My grandfather used to do that. He'd hear a song on the radio and just
couldn't help it.

I used to have those whistler things on my truck once for letting deer
(4-legged) know you were coming down the highway. Maybe someone stuck one of
those on your car. Maybe not. Just a thought. [yeah yeah I know]

Maybe drive near a Jersey wall with the other window down and get a better
listen on it and try and figure what side its on. Air whistling through the
riggings is a toughy. Has the thing ever had body work done on it?

my guess is a loose/worn out serpentine belt...

irax.

An animal stuck in engine may produce such sound. Remove immediately

Don't think it's a snake, rabbit more likely

Exacctly, either deeer or rabbit

"Comboverfish" > wrote in message
oups.com...
>
> A very small vacuum leak in terms of surface area in a strong vacuum
> area such as near an intake manifold runner could produce a whistling
> sound that is more pronounced on deceleration. Sure sounds like an
> intake gasket to me. Well, actually I can't hear it, but that's what
> it *seems* like.
>
> Toyota MDT in MO
>

I noticed today that with the A/C on (haven't used it much lately), I hear a
different air sound after shutting off the car that's more of a sshhhhhh.
It goes on for a good 15 or 20 seconds and seems to be coming from near the
brake booster. Now I just need to find the instructions for checking the
check valve. I've temporarily misplaced my manual....

I still can't hear the leak unless the car's moving.

Chris