Whistling noise during acceleration.
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Joined: Feb 2002
Posts: 66
Likes: 0
From: Austin TX
Whistling noise during acceleration.
Whenever I step on the gas I hear a short whistling noise. Sounds like it's coming from the front driver's side area. Can't figure out what the heck it is. Any ideas? Belt, normal LS1 intake whistle, or maybe my imagination? Whatever it is, it's bugging the crap out of me.
Deetch
Deetch
Racer
Joined: Feb 2002
Posts: 479
Likes: 1
From: Portland OR
Re: Whistling noise during acceleration. (DeetchC5)
Deetch -
Mine makes a very high pitched whistling noise when the throttle is around 10 percent position. It is very sensitive to throttle position. I have assumed it is from air flow through throttle area. But who knows? Also I didn't notice any change after replacing stock filter with a Blackwing.
Alan
Mine makes a very high pitched whistling noise when the throttle is around 10 percent position. It is very sensitive to throttle position. I have assumed it is from air flow through throttle area. But who knows? Also I didn't notice any change after replacing stock filter with a Blackwing.
Alan
Drifting
Joined: Sep 2001
Posts: 1,332
Likes: 0
Re: Whistling noise during acceleration. (DeetchC5)
if you have an aftermarket sound system it can be line noise dur to the amp turned up too high, or wires too close to each other, or no ground wire :cheers: , as far as i konw could also be alternator whine :confused:
Instructor
Joined: Nov 1999
Posts: 195
Likes: 0
From: Canada
Re: Whistling noise during acceleration. (alc2001)
alc2001 are you getting this whistling noise right at 2200rpm to 2300 rpm steady throttle or even on light decel?
The reason I ask is mine does it right in that rpm range if I'm crusing steady on the hightway. But goes away the minute I touch the throttle. Just past 10%. 15% or more and no noise? Maybe throttle body whistle? Anyone else?
:rolleyes: :confused:
The reason I ask is mine does it right in that rpm range if I'm crusing steady on the hightway. But goes away the minute I touch the throttle. Just past 10%. 15% or more and no noise? Maybe throttle body whistle? Anyone else?
:rolleyes: :confused:
Drifting
Joined: Oct 1999
Posts: 1,576
Likes: 0
From: Austin TX
Re: Whistling noise during acceleration. (Vet-Y2K)
Sounds like intake manifold whistle.
Mine will do it on light acceleration at ~ 1600 RPM, with a few lighter harmonics.
As far as I can tell, it's not hurting anything, just annoying. There is a TSB out there for it, and they replace the intake manifold.
F
Mine will do it on light acceleration at ~ 1600 RPM, with a few lighter harmonics.
As far as I can tell, it's not hurting anything, just annoying. There is a TSB out there for it, and they replace the intake manifold.
F
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Melting Slicks
Joined: Feb 2002
Posts: 2,290
Likes: 1
From: Ca
Re: Whistling noise during acceleration. (robsvette)
are you the 2nd owner? maybe you have a LPE twin turbo!!! :eek:
Racer
Joined: Feb 2002
Posts: 479
Likes: 1
From: Portland OR
Re: Whistling noise during acceleration. (Gandalf)
Here is the TSB from the GM service web site:
32. #A001582A 5.7 LS1 LS6 Engine Whistle Type Noise Off Idle to 2000 RPM - DRIVEABILITY RESONANCE THROTTLE A001582A SUPERSEDES A001582
When you click on it this is what you get:
Information Not Available
The information associated with this title is Preliminary Information and may not have been validated
by GM for accuracy and effectiveness. For further information, non-GM dealers call 1-800-260-9377.
GM Dealers contact GM Technical Assistance
at the number you have been provided.
Can anyone access this TSB?
32. #A001582A 5.7 LS1 LS6 Engine Whistle Type Noise Off Idle to 2000 RPM - DRIVEABILITY RESONANCE THROTTLE A001582A SUPERSEDES A001582
When you click on it this is what you get:
Information Not Available
The information associated with this title is Preliminary Information and may not have been validated
by GM for accuracy and effectiveness. For further information, non-GM dealers call 1-800-260-9377.
GM Dealers contact GM Technical Assistance
at the number you have been provided.
Can anyone access this TSB?
Safety Car
Joined: Mar 1999
Posts: 3,630
Likes: 8
From: Virginia Beach Virginia
Re: Whistling noise during acceleration. (DeetchC5)
The "dreaded" whistle only applies to the '01 model. GM redesigned the intake plenum when it brought out the Z06. It used the same plenum on the coupes and convertibles. There is an indentation/pocket in the plenum right where the throttlebody is mates to the plenum. As the air rushes in and your RPM is somewhere between 2,100 to 2,400 RPM you will hear a whistle (worse when the outside air temp is colder). Some cars whistle louder than others. Sometimes you get lucky and the whistle is barely noticeable. I hear mine "whistle" only when the temp drops below 45 degrees outside. Other than that, I never hear it. Turn up your stereo and it's practically gone. When the '02 came out GM had fixed the intake plenum problem. It's my understanding that if the "whistle" is really driving you crazy, that there is a TSB which allow you to have the plenum replaced.
MN6's (like mine) can sustain the whistle by just putting into that RPM range and holding it there (most '01 automatics only hear it momentarily since their overdrive will drop it below 2,000RPM for most driving).
MN6's (like mine) can sustain the whistle by just putting into that RPM range and holding it there (most '01 automatics only hear it momentarily since their overdrive will drop it below 2,000RPM for most driving).
