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Thread: Coyote fuel pump ?

  1. #1
    Member 77233349975's Avatar
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    Coyote fuel pump ?

    I just lost my second fuel pump . The first two where not top of the line .Trying to save a $. You get what you pay for . Can you guys give me some suggestion as to brand and part # to be my last fuel pump .I never got out of the garage with the first two. thanks a lot.!!!!!!!!!!!

  2. #2
    Senior Member edwardb's Avatar
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    In tank or external? What fuel line sizes are you using? Even a low quality pump should last longer than in your garage. I got my in tank pump from Mark at Breeze. But I would try to figure out if maybe something is wrong before throwing another one at it.
    Build 1: Mk3 Roadster #5125. Sold 11/08/2014. Build 2: Mk4 Roadster #7750. Sold 04/10/2017. Build Thread
    Build 3: Mk4 Roadster 20th Anniversary #8674. Sold 09/07/2020. Build Thread and Video. Build 4: Gen 3 Type 65 Coupe #59. Gen 3 Coyote. Legal 03/04/2020. Build Thread and Video
    Build 5: 35 Hot Rod Truck #138. LS3 and 4L65E auto. Rcvd 01/05/2021. Legal 04/20/2023. Build Thread. Sold 11/9/2023.

  3. #3
    Member 77233349975's Avatar
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    Sorry for the lack of info. I have 5/16" fuel line going and coming .My fuel pump is outside of the tank. I removed it and hooked it to the battery and nothing. It must dead! I need a brand of a good pump that can put out more than 55psi . help and thanks!

  4. #4
    Senior Member edwardb's Avatar
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    You need to look at flow rate plus pressure. The Ford Coyote instructions state 155L/Hr minimum at 55psi. The 5/16-inch lines should be ok, although it's discussed some. I used a Walbro in mine. In-tank vs. external though. Supposed to be a good brand and as I understand supply to many other brands. But there are lots of choices. Maybe someone else has a specific recommendation. I'm still concerned you've had two failures before ever driving the car.
    Build 1: Mk3 Roadster #5125. Sold 11/08/2014. Build 2: Mk4 Roadster #7750. Sold 04/10/2017. Build Thread
    Build 3: Mk4 Roadster 20th Anniversary #8674. Sold 09/07/2020. Build Thread and Video. Build 4: Gen 3 Type 65 Coupe #59. Gen 3 Coyote. Legal 03/04/2020. Build Thread and Video
    Build 5: 35 Hot Rod Truck #138. LS3 and 4L65E auto. Rcvd 01/05/2021. Legal 04/20/2023. Build Thread. Sold 11/9/2023.

  5. #5
    Senior Member DaleG's Avatar
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    I was one who had 3 in-tank pump failures within 150 miles; post mortem revealed one to be chewed-up inside and siezed; another had brushes not contacting, not sure about the first one.

    Could not find any electrical issues, but decided to run the pump via a relay just for grins. No issues within the last 700 miles. **** happens.
    SOLD 03/2013: MK II #5004: 5.0 EFI: 8.8, 3.55, E303, TW heads, GT40 intake, 24#, 70mm MAF

    Ordered MK IV Coyote Complete Kit.

  6. #6
    Member 77233349975's Avatar
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    coyote fuel pump

    --------------------------------------------------------------------------------

    I am using a Wilbro GSL-391BX pump. I have 5/16" fuel lines to and from. I am using the coyote harness to power the pump. I have 12v. +&- at the pump and nothing! Every thing worked good with the first install .I cant even get the pump to run when I hook it up to the battery direct . Don't understand

  7. #7
    Senior Member DaleG's Avatar
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    Check fuses? Inertia switch tripped?
    SOLD 03/2013: MK II #5004: 5.0 EFI: 8.8, 3.55, E303, TW heads, GT40 intake, 24#, 70mm MAF

    Ordered MK IV Coyote Complete Kit.

  8. #8
    Senior Member Duke's Avatar
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    Quote Originally Posted by 77233349975 View Post
    coyote fuel pump

    --------------------------------------------------------------------------------

    I am using a Wilbro GSL-391BX pump. I have 5/16" fuel lines to and from. I am using the coyote harness to power the pump. I have 12v. +&- at the pump and nothing! Every thing worked good with the first install .I cant even get the pump to run when I hook it up to the battery direct . Don't understand
    I suspect your ground wire is tripped from the Inertia switch or not completely grounded. 12v is supplied to the pump, then try running a temp ground to the chassis to see if the pump will turn on.

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