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Siren sound when pressing the gas

Discussion in '2nd Gen. Tacomas (2005-2015)' started by saugus, Oct 8, 2011.

  1. Oct 8, 2011 at 9:56 AM
    #1
    saugus

    saugus [OP] Well-Known Member

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    Just realized that there is a slight siren resonating sound that I get when pressing the gas. I noticed it at freeway speeds (55+). It's kind of like a radio interference siren sound. I never really noticed it before because I usually have the radio on, but it is a little annoying. Is this normal? I am thinking maybe throttle body noise?
     
  2. Oct 8, 2011 at 10:14 AM
    #2
    LEX

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    Do you have any aftermarket stereo equipment?
     
  3. Oct 8, 2011 at 10:16 AM
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    Warhorseforever

    Warhorseforever Will The Thrill

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    It could be alternator whine if you have aftermarket radio. Does it sound like a turbo or a super charger whine?
     
  4. Oct 8, 2011 at 10:19 AM
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    Tigahshark

    Tigahshark Senior NEWBIE

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    OR if you do have a aftermarket stereo it could be not grounded correctly
     
  5. Oct 8, 2011 at 10:24 AM
    #5
    saugus

    saugus [OP] Well-Known Member

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    Yes but the noise does not appear to be coming from the speakers. I am going to clean the tb and replace the air filter later. I will see if the noise remains.
     
  6. Oct 8, 2011 at 10:24 AM
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    LBtaco

    LBtaco Thread killer

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    could it be the windshield seals buzzing? there is a TSB on it.
    Mine does it occasionally.
    When I first heard mine I thought it may be a radio issue, but.... it wasn't:eek:

    If not, maybe aftermarket stereo is causing it?
     
  7. Oct 8, 2011 at 1:21 PM
    #7
    aficianado

    aficianado Well-Known Member

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    is there a cop in the rearview? :)

    check your stereo grounds.
     
  8. Oct 8, 2011 at 1:51 PM
    #8
    saugus

    saugus [OP] Well-Known Member

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    Update:

    I drove around town to check it out again and could not duplicate it.:confused: I thought I must have been ultra sensitive the other day. Then I decided to drive fast on the way back and put it in 5th gear. As soon as I hit 62 mph, the noise started up again and continued as I increased speed. It is definitely too annoying of a whine to ignore. Almost certain it is not coming from the speaker (stuck my ear up to the speaker and there was no difference). It is a howling wind siren noise like I remember coming from my old Ford truck carburetor.

    I'm going to pull the air box, clean the maf and tb, replace the air filter and pull the secondary filter. I'll report back later to see if it fixes the issue.
     
  9. Oct 8, 2011 at 7:44 PM
    #9
    G.T.

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  10. Oct 9, 2011 at 5:36 PM
    #10
    saugus

    saugus [OP] Well-Known Member

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    Update:

    I did all the things in my last post (replace filter, remove secondary, clean tb and maf) and now the problem appears to be gone for the most part. There still appears to be a wierd sound but it isn't nearly as bad and almost sounds like it may be the tires. I think the filthy throttle body may be to blame. I feel a little better throttle response from changing the air filter and removing the secondary. The added bonus is that the idle vibrations seem to have gone away. I'll call it success.:cool:
     
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