Whistles...like A Reed Or Flute On Take Off

[sk1951]

96 es300 whistles...like a reed or flute on take off from dead stop only. No sound when driving. You can barley hear it inside but is louder out side. It is in the back of the car. I know...get off the drugs dude! No really...it is a sad moaning sound. It does not sound metallic or like a stress sound. Just a oooooOOOOoooooooooo for about 2 or 3 seconds. No...I don't have Casper in the trunk...!Removed! I can hear all the comments already! It fades in and fades out. Really strange. Does not sound like exhaust or exhaust leak. Other wise the car is perfect. What can I say...anyone heard of this before?

[ricehead]

there are a limited number of things in the rear of the car that could truly be making that type of noise - my first hunch would be a bad fuel pump?

[pj8708]

96 es300 whistles...like a reed or flute on take off from dead stop only. No sound when driving. You can barley hear it inside but is louder out side. It is in the back of the car. I know...get off the drugs dude! No really...it is a sad moaning sound. It does not sound metallic or like a stress sound. Just a oooooOOOOoooooooooo for about 2 or 3 seconds. No...I don't have Casper in the trunk...!Removed! I can hear all the comments already! It fades in and fades out. Really strange. Does not sound like exhaust or exhaust leak. Other wise the car is perfect. What can I say...anyone heard of this before?

This is the basic wild a__ guess based on purely non scienentific knowledge. At one time I owned a Buick, which as a part of it's emmision controls maintained a vacumn on the neck of the gas tank filler pipe. When the gas cap was removed, there was a "wosh" sound relieving the pressure diffrence.

If the cap was not replaced tightly it would produce a small noise such as a whistle as it tried to reestablish the vacumn to retain the gasoline vapors. However, the "Check Engine Light" would also appear telling you to reseal the gas cap.

I have not encountered such a vacumn sound on my Lexus so do not know if this could be the case or not. Hence the disclaimer!

PJ

[pj8708]

96 es300 whistles...like a reed or flute on take off from dead stop only. No sound when driving. You can barley hear it inside but is louder out side. It is in the back of the car. I know...get off the drugs dude! No really...it is a sad moaning sound. It does not sound metallic or like a stress sound. Just a oooooOOOOoooooooooo for about 2 or 3 seconds. No...I don't have Casper in the trunk...!Removed! I can hear all the comments already! It fades in and fades out. Really strange. Does not sound like exhaust or exhaust leak. Other wise the car is perfect. What can I say...anyone heard of this before?

This is the basic wild a__ guess based on purely non scienentific knowledge. At one time I owned a Buick, which as a part of it's emmision controls maintained a vacumn on the neck of the gas tank filler pipe. When the gas cap was removed, there was a "wosh" sound relieving the pressure diffrence.

If the cap was not replaced tightly it would produce a small noise such as a whistle as it tried to reestablish the vacumn to retain the gasoline vapors. However, the "Check Engine Light" would also appear telling you to reseal the gas cap.

I have not encountered such a vacumn sound on my Lexus so do not know if this could be the case or not. Hence the disclaimer!

PJ