Whining/Siren Noise

[QbanCgar]

was driving the Expy a couple of weeks ago & i started hearing a whining or siren noise. i actually thought it was a siren, so i looked around (front, back, side to side) to see if i saw any emergency vehicle & nada. so i just chalked it up to it possibily being a Fire Engine siren in the distance. well i heard i again yesterday & it seems to be coming from under the hood. has anyone else expeerienced this sound? if so, what was it? thanks in advance.

 

[bedrck46]

The cold weather causes some strange noises you should hear my Escape when it gets cold did the noise disappear as the expy heated up??

 

[QbanCgar]

The cold weather causes some strange noises you should hear my Escape when it gets cold did the noise disappear as the expy heated up??

well considering i only have like a 10 min commute to work, i can't say that it has. i will get back to you on this tomorrow as i will be driving it for a couple of hours.

 

[Lightnig]

sounds kind of like the good old slipping fan belt on the old cars with V-belts.

When temperature plummeted rubber would get stiff and not want to bend, and steel pulleys would get slippery, and bearings would stiffen up as well and make it even harder for the pulleys to turn.

Pretty much disappeared when the serpentines came out, but can still happen if the tensioners are not working properly.

 

[Yudaman]

My '98 has a high pitched whine that I can only guess is the power steering pump. Turn the radio up a little and the whine goes away!
Can you tell where it is coming from under the hood?

 

[debbieeees]

I had that happen for about a week. Was told to check the EGR Valve (I think). Sounds like a tea kettle.

 

[K9JRF]

I'm not sure what it is and haven't in the 5 years of owning it figured it out, but what you describe is the same think by 02 does when ever it 20 degrees or below outside. It will do it until its gets warm unless it's below zero outside and then it does it continually.

I only hear it when the motor idles up or I'm accelerating, when accelerating if I let off the gas pedal it goes away then as soon as I press on the gas it comes back.