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Is my Raptor Possessed?

Discussion in 'Ford F-150 Raptor General Discussions [GEN 2]' started by Woolaroc, Mar 31, 2020.

  1. MnFlyer

    MnFlyer Full Access Member

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    Mine does that. I assumed it was a small Peruvian gnome checking the oil??


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  2. rabidranger

    rabidranger Member

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    Mine does the same thing. Dealer has no clue.

     
  3. Jraptor78

    Jraptor78 Member

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    Mine does it when opening the door always figured it was the fuel pump priming since the truck is keyless.. On a keyed truck when the key hit the assy spot you could hear the same noise..
     
  4. Antho

    Antho Full Access Member

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    From what i've heard these are 2 different noises. Opening the door triggers the fuel pump to prime. To me that's more of a thumping noise. The under the hood noise sounds different to me. I thought my neighbor was running a dremel in their garage for a few seconds at a time but turned out to be my truck.
     
  5. GunMonkeyINTL

    GunMonkeyINTL Full Access Member

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    Apologize in advance if this hijack, but it is related to the oddities these things make when you get in and start them.

    When I first mine in gear (D or R), and first get rolling, it feels like there is a little hitch in the giddy up. The rear end feels like it droops for just a second. It does it the same way every time, so I assume it’s normal. Is it like an auto parking break releasing or something?
     
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  6. hedonist222

    hedonist222 Full Access Member

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    I don't think it should be doing that.

    May I suggest you start a new thread as it seems different than OP's scenario.
     
  7. Woolaroc

    Woolaroc Full Access Member

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    This is completely normal. Search Rear end drop on reverse. It’s something to do with the torque when engaging reverse or drive. I feel it most in the morning when I pull out of the garage. Driver side rear whee drops a bit.
     
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  8. Badgertits

    Badgertits FRF Addict

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    this is 2 different things. There’s an actuator “luck unlock” type sound my truck makes when I open door even if things been sitting for a while (I have 801a w/ real key) no idea what it is but it’s a faint knock type sound maybe even fuel system priming in anticipation of being started?

    then there the high pitched hiss/whistle that occurs when truck is sitting even for hrs after being driven. Occurs intermittently usually in sequence - seems like many ford trucks do this nobody knows what it is.
     
  9. GunMonkeyINTL

    GunMonkeyINTL Full Access Member

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    Thanks. I found a couple threads describing it exactly. Seemed to be a couple theories on what it was, but no one was sure.
     

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