spectra fuel pump

Discussion in 'Electrical' started by donelle87ls, May 11, 2018.

  1. donelle87ls

    donelle87ls Not-quite-so-new-guy

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    hello i have a 87 montecarlo with the tbi.
    I ordered the spectra #sp172a1h sending unit the spectra unit has 2 pins as my stock unit has 3 pins that connects to the fuel wiring harness . is there a way that i can wire the spectra wires into the stock one.
     
  2. fleming442

    fleming442 Royal Smart Person

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    Does the Spectra have a ground tab? You should only need pump power and fuel level inside the tank; if you ground the assembly on top (outside of tank).
     
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  3. donelle87ls

    donelle87ls Not-quite-so-new-guy

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    yes it has a ground tab would i need to splice the pink wire to get a read on the fuel level.
     
  4. UNGN

    UNGN Royal Smart Person

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    The tank should have 3 wires: fuel pump +, Sending unit wire and common ground. What ever wire isn't 12 volts with the key on or makes the fuel gage move when grounded gets hooked to ground. (it should also show zero Ohms to ground on the multimeter)

    Never trust wire colors in 30 year old cars. Test them.
     
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