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Thread: High Pitch Buzzing Noise Undercarriage rrage

  1. 07-02-2020, 09:06 PM #1
    dcwang3
    dcwang3 is offline Member
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    High Pitch Buzzing Noise Undercarriage rrage

    I am hearing a high pitches buzzing noise underneath the car. It’s more prominent on the passenger side near where the exhaust cats are when idling. Anyone have a clue on what could be making that noise?
    Last edited by dcwang3; 07-02-2020 at 09:07 PM.
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  2. 07-03-2020, 01:22 PM #2
    mmark.
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    It could be your airpump running on, but there are no devices near the cats (heat).
    You need to hunt a little more.
    My suspicion is a failing fuel pump further back.
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  3. 07-04-2020, 08:23 AM #3
    craigjimc
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    Could be a loose heat shield (broken weld) on the catalytic converter. Typical issue.
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  4. 07-06-2020, 12:32 PM #4
    dcwang3
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    Quote Originally Posted by craigjimc View Post
    Could be a loose heat shield (broken weld) on the catalytic converter. Typical issue.
    hmm ok, I'll have a take a closer look. Thanks for the suggestions
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  5. 07-07-2020, 09:43 AM #5
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    blckstrm
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    Quote Originally Posted by dcwang3 View Post
    hmm ok, I'll have a take a closer look. Thanks for the suggestions
    I was going to say the same thing. My heat shields on my cats break loose sometimes and make a ton of noise.
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