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Thread: Weird Groaning Sound Coming From Under the Hood

  1. #1
    Join Date
    Jan 2023
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    Abington, PA
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    Weird Groaning Sound Coming From Under the Hood

    Every now an then, and with no warning or frequency, I am getting a strange short Groaning sound from under the hood lasting under 5 seconds. The car is always moving when it happens. From the driver's seat it sounds like it is from the passenger side under the hood. I cannot duplicate it to save my soul. It does not sound like suspension. it almost sounds like something losing air. It's a groan and a vibration. Anyone heard of something like this?

  2. #2
    Join Date
    Mar 2004
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    Baltimore, Md.
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    It may be coming from the Air Suspension compressor/valve behind the driver's side headlight.

    BTW: I also make a 'weird groaning sound for 5 seconds.....every time that I try to get out of bed in the morning.
    2020 Ford Ranger STX DFI Turbo 2.3L 10 speed Auto
    2017 Ford Fusion Sport DFI Twin Turbo 2.7L V6 6 speed Auto (14.000 ET bone stock in 82 degree heat)
    1985 Mustang GT 5.0 Hatchback 4bbl 5 speed manual (525 HP 363 Dart block/AFR heads with Magnum 6 speed in the works)
    1984 Mustang GT 2.3 Turbo Convertible FI. 5 speed manual
    1966 427 Cobra (ERA) 468 all Aluminum FE 2x4bbl 5 speed manual

    SOLD : 2003 Mercury Marauder FI. 4 speed Auto
    w/Crower Cams & Springs, +1mm SS valves, mild port job on the cylinder heads.
    Extrude honed intake w/PHP spacer.
    Kooks Headers w/2.5" High Flow Cats & X-Pipe, Magnaflow mufflers, OEM tailpipes w/Megs Tips
    B&M Trans cooler w/fan, Level 10 Shift Kit, Art Carr Hughes Deep Sump Trans Pan,
    SVO Rearend Girdle, Redline Gear lube; OEM 3.55s
    'Real Gauges' + matching Trans Temp, Oil Temp, Water Temp, Fuel Pressure, Vacuum/Boost Gauge
    Built: 10/15/02 Bought: 12/16/02 Sold: 10/15/18

  3. #3
    Join Date
    May 2019
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    Harrisburg, NC
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    Quote Originally Posted by Joe Walsh View Post

    BTW: I also make a 'weird groaning sound for 5 seconds.....every time that I try to get out of bed in the morning.
    Me too...and I also make sounds like something is losing air...

  4. #4
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    Quote Originally Posted by Joe Walsh View Post

    BTW: I also make a 'weird groaning sound for 5 seconds.....every time that I try to get out of bed in the morning.
    Me too, my friend…

  5. #5
    Join Date
    May 2009
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    Moreau Island
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    12,207
    How's the A/C fluid level?

  6. #6
    Join Date
    Jan 2023
    Location
    Abington, PA
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    Quote Originally Posted by Mr. Man View Post
    How's the A/C fluid level?

    Good Question! I will have that checked. It does seem to cycle A LOT!

  7. #7
    Join Date
    Jun 2017
    Location
    Oxford, PA
    Posts
    459
    Cycling on /off = low on charge most likely, I had to replace my accumulator (famous for rusting out on these cars) $33 recharge 30 oz R134a now blows ice cold. Get a shop to remove your remaining charge first.
    2003 300A BLK/DC
    153K : runs like a swiss watch...
    395/7838

  8. #8
    Join Date
    May 2009
    Location
    Moreau Island
    Posts
    12,207
    If you need to replace that A/C coffee can thing, see if you can locate one made of aluminum. Ford will sell you a steel one which over time will rust out again. I believe Napa or one of the other FLAPs sell an aluminum one. Check RockAuto too.

  9. #9
    Join Date
    Nov 2019
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    Mine does it when I start the car with the ac on. Try turning off ac and see if it still does it. I bought a new vacuum door thing not the actuator this is silver and has vacuum tubes and goes on the ac unit under the dash haven’t tried to install yet

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