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Thread: Return fuel feed

  1. #1
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    Return fuel feed

    Gents,

    I haven’t had much time to work on the roadster lately but today I was in the shop for a bit. I have a new scope so I thought I would take a look in the gas tank to see how much fuel was left (verifying the fuel gauge). I noticed my return feed hose is dumping right into the Fuel pick up “pan”. That feels like it should not be doing that. Is that correct? I can likely move it fairly easily by using a long grappler, but thought I should check. Or perhaps it doesn’t really matter.

    Thoughts?
    ----
    Mk4 complete kit arrived 10 May 23
    Current BOM and Build Thread

  2. #2
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    It should be outside the pick-up pan if possible. Helps to keep the ‘pick-up’ fuel less turbulent, to enable easier pumping.
    Build 2: Mk5 Complete kit | Coyote Gen 4X | TKX | IRS | Brake Booster | Traction Control | Ordered: 3/18/2026 | Build Thread
    Build 1: Mk4 Roadster | Coyote Gen 4X | Ordered: 1/31/2024 | Delivered: 4/11/2024 | First Start: 8/9/2025 | Legal: 11/5/2025 | Crashed: 2/16/2026 Build Thread

  3. #3
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    OTOH putting it into the pickup pan helps keep the pan full during cornering.
    FFR MkII, 408W, Tremec TKO 500, 2015 IRS, DA QA1s, Forte front bar, APE hardtop.

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  5. #4
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    Stock Fox bodies did the same. My stock pan has been like that for 26yrs, no issues. Also, on my '02 Coyote swap Mustang, I put the return into the "fuel sump/pump" can (center of tank) and can run that down to less than 3gal on track. Before that change, maybe just below 1/2 tank before having starving issues in corners.
    I'm just a victim of a thousand physic wars!
    www.weendoggy.com/cobra.htm

  6. #5
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    That is how it should be.
    As a second note, the returning fuel is thought to help keep the pump cool. I have no proof of that, but I've seen that idea posted about.
    Last edited by rich grsc; 04-13-2026 at 08:33 AM.
    Mrk III, 331 stroker, Borla stack injection, T5, 3:55 IRS, Power steering and brakes. Kleiner body & paint

  7. #6
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    I stand corrected.
    Build 2: Mk5 Complete kit | Coyote Gen 4X | TKX | IRS | Brake Booster | Traction Control | Ordered: 3/18/2026 | Build Thread
    Build 1: Mk4 Roadster | Coyote Gen 4X | Ordered: 1/31/2024 | Delivered: 4/11/2024 | First Start: 8/9/2025 | Legal: 11/5/2025 | Crashed: 2/16/2026 Build Thread

  8. #7
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    Thanks all!
    ----
    Mk4 complete kit arrived 10 May 23
    Current BOM and Build Thread

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