Carb coverters PLEASE HELP

Discussion in 'Fox 5.0 Mustang Tech' started by moonenn3186, Dec 14, 2003.

  1. moonenn3186

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    I am having a hell of a time wiring my EFI pump to work w/o the EEC IV.

    I am trying to tap into the fuel pump relay under the drivers seat.

    Its an 86 and I need to know exactly what to do with what wires.
     
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  2. FoxBodyGT

    FoxBodyGT New Member

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  3. Bill88Stang

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    i converted my 88 to carb and i just ran a seperate pump. i ran a holely blue pump wiht braided line although u can go cheaper and use aluminum then you just have to bend it your self. i duno how well your efi pump would work on a carb setup i hope your planning to you a regulator and tunr the pressure way down but that might affect flow. efi pump run high pressure low volume and carb pump run low pressure high volume.i had a hell of a time as well trying to reuse the stock fuelp pump relay to get power to the holley pump and i could not get it to work. im guessing the computer switches on side of that relay from pwoer to ground becasue i coudl not get it to work right so i bought a relay and wired it in myself and just ran the pump to a switch to turn it on or off. carbdford.com has a great write up on converting over to carb and all the wiring thats where i got my info from i hope i could be some help to you.
     
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  4. charlesw6954

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    with my old 84 i was told to wire my electronic fuel pump to something that turns on when the key turns to the on position.
     
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  5. moonenn3186

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    I have a Holley red I plan on using when I get a sumped tank - however for Temp use i would like to use the eFI PUMP with a return style regulator. I can be done I have seen it used.

    I located the green relay under the seat - I tried using the Carb convert writeup but that did not work at all - he was talking about wires in the engine compartment for the fuel pump relay, which I do not have.

    I grounded the tan/green stripe wire and ran power to the red/blue stripe wire and got nothing.

    Give me some more iedes. I will be using this wiring for the Holley pump as well.
     
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  6. gearheadboy

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    NEVER EVER WIRE YOUR PUMP HOT WITH THE KEY ON!!!!!
    If ya roll or crash and the fuel line breaks, your pump just keeps on fuelin the fire.
     
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  7. gearheadboy

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    Food for thought: use an oil sending unit to ground the fuel pump relay. Thus no oil pressure, no pump.
     
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  8. moonenn3186

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    For clarification:

    I do not plan on wiring it hot, that is why I want to use the stock wiring and the key switch.

    f My I - how do I ground it to oil pump sending unit?
     
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  9. PURESTREET5006

    PURESTREET5006 New Member

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    Just get a separate fuel pump be it mech or elec. and run new lines from the tank up,but if you go electric that pump has to push not pull.
     
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  10. moonenn3186

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    I can not, nor do I want to, use a mechanical pump.

    I have a Holley Red pump and am abreast on how to use it.

    I still need to figure out how to get power to the elec pump in order to hook it up. I would also prefer to use the stock wiring for obvious reasons.

    So please help if you have done this before. . .
     
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