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Whistling Sound

This is a discussion on Whistling Sound within the General Help forums, part of the LSx Technical Help Section category; I just heard it the first time a few days ago. Its not doing it constantly, otherwise I'd have dogs ...

  1. #1
    Junior Member Formula Dave's Avatar
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    Arctic White
    2000 Formula

    Whistling Sound

    I just heard it the first time a few days ago. Its not doing it constantly, otherwise I'd have dogs chasing me down the street howling.

    The car is completely warmed up, been driving for about 1/2 hour on the highway. I let up off the gas and coast and hear a high pitched whistling sound. It seems like it goes away when I accelerate again.

    Of course anytime I can pull over and stop and pop the hood it stops. Any suggestions?

    Everything is stock except for the catback.

  2. #2
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    is it coming from the front or back of the car?

  3. #3
    Junior Member Formula Dave's Avatar
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    Arctic White
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    Quote Originally Posted by 0rion View Post
    is it coming from the front or back of the car?
    Front.

    On another site it was suggested that it may be the air system. When it gets back into the 40's I'll pop the hood and check out the connections on the air and egr.

  4. #4
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    Black
    2002 Ram Air Trans AM

    r u sure it not the rear they r known to make crazy noises

  5. #5
    Junior Member Formula Dave's Avatar
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    Arctic White
    2000 Formula

    It is definitely under the hood. Its on the passenger side of the vehicle couldn't really pin point the location.

    I was in a parking garage and I didn't have much time was on my way to a meeting so I couldn't really pin point the location. Of course the normal rule applies, it didn't do it when I went home and put the car in my driveway.

  6. #6
    Senior Member greatwhiteZ28's Avatar
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    white
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    mine started whisling after my lid install from the small air breather filter. might be that if you just put one on

  7. #7
    Junior Member Formula Dave's Avatar
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    Arctic White
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    I got the whistling to start again, it stopped after about a minute of trying to pinpoint the noise.

    Initial listen puts in in the vicinity of the AIR, EGR or PCV
    it is definitely on the passenger side. I'm going to try replacing the PCV valve first, haven't done it in a while.

    If it does it again after that I'm pulling AIR fuse/hoses.

  8. #8
    Junior Member Formula Dave's Avatar
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    Arctic White
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    ok, just replaced the PCV and went out for a nice night ride. 1/2 hour later no whistle.

    There was some crud on the old PCV valve but nothing that stoped it from rattling. Car idles a little smoother.

  9. #9
    O U 8 1 2 Spaz's Avatar
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    sounds like your car is going in and out of closed loop and open loop... my car makes a barley audible whistle untill it warms up...

  10. #10
    Junior Member Formula Dave's Avatar
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    Arctic White
    2000 Formula

    I found the source after moving the hose connected to the PCV valve again, I noticed the hose directly under the PCV hose was almost completely disconnected.

    WHISTLING SOUND IS GONE!!!

    now to figure out where that rattling noise is comming from.

  11. #11
    Senior Member SeVeReDiStOrTiOn's Avatar
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    Quote Originally Posted by Formula Dave View Post
    now to figure out where that rattling noise is comming from.
    I had bad rattling coming from the o2 sensors...there's a metal ring around the sensor at the start of the wiring insulation. The damn thing rattles like no ones business...a little RTV will quiet it down.

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