03 Gt

Discussion in 'SN95 4.6L Mustang Tech' started by felder25, Jan 6, 2014.


  1. felder25

    felder25 New Member

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    Car makes a boiling/bubbling sound when I start it, or come to a stop. Engine idle also fluxuates randomly when at a stop. What could this be and how can I stop it??
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  2. Computer-Chkn

    Computer-Chkn New Member

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    maybe something like a vacuum leak?
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  3. trombonedemon

    trombonedemon Well-Known Member

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    More info, mods or tunes? If you do have a vacuum leak, local mechanic should be able to run smoke through vacuum system. On the upside engines produce water from the air so when it is cold on start there is some H20 in the system.
    Last edited: Jan 8, 2014
    #3
  4. madspeed

    madspeed Colonel Mustard Mod Dude Founding Member

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    pull codes
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  5. Mustang5L5

    Mustang5L5 Car used in adult film "Highway Gangbang-InDaButt" SN Certified Technician Founding Member

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    When I owned my 2003 GT, it made this same bubbling noise. Heard it in the area of the heater core, so I just assumed it was air bubbles in the cooling system bleeding through the core.

    Never addressed it. Car ran great from time it was new to 100k miles when I traded it in.
    #5

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