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Calling All Tech-2 Owners - Fuel Pump Data

Discussion in 'Engine & Drivetrain' started by swathdiver, Apr 10, 2020.

  1. swathdiver

    swathdiver Full Access Member

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    For those of you that can see your Fuel Pump Module, what are your Fuel Pump trims?

    Mine started off at about 1.25 three years ago and is now at 1.54. Is this a sign of the pump's health? And if so, how high means it is time to replace?
     
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  2. mikeyss

    mikeyss Full Access Member

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    I will try and see mine today. However, I have an emergency dentist appt this morning and don't know what all they will be doing to me.
     
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  3. swathdiver

    swathdiver Full Access Member

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    Probably yank out some teeth! No, nowadays, they give you anti-biotics and pain meds and have you come back to pull or fix the tooth. Good luck my friend!
     
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  4. Fless

    Fless Full Access Member

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    What are fuel pump trims? What do they indicate?
     
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  5. mikeyss

    mikeyss Full Access Member

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    Thanks, I think I'll need it, haha. My furthest back molar chipped almost a year ago, but I didn't get it checked because it didn't hurt, and I couldn't afford to spend 1 to 2 grand. Now that I have savings, I was hoping to ride this out. But last week the nerve woke up or something and my jaw even hurts to open
     
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  6. thompsoj22

    thompsoj22 Full Access Member

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  7. swathdiver

    swathdiver Full Access Member

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    Not really sure Steve. I'm speculating that they operate like the motor, adding or taking away pump power to meet the desired output. If the computer commands 33% so it delivers X amount of pressure or volume and 40% is required then that makes sense to me as I write it out here.

    Have a friend yank it out = FREE
    Let the doctor pull it out = $200-300
    Root Canal = $2000
     
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  8. gooffeyguy

    gooffeyguy Full Access Member

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    Where would this be found in the Tech2?

    I'm off today (holiday), and don't plan on going anywhere, but I can get a reading later with it idling in the garage.

    I know years ago, at least on my 5.0 mustang, it used a fuel pressure regulator that operated via vacuum. Then on the 4.6 mustang like my wife's, it uses a FPDM modual to raise/lower fuel pump voltage to increase/decrease pressure as the motor needed it.

    2001 Yukon SLT
    2012 Yukon Denali XL
    2011 Yukon Denali RIP 5/20/18
     
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  9. swathdiver

    swathdiver Full Access Member

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    On mine it's in the Engine Control Module and in there it has its own heading, under the engine and above the Transfer Case and Transmission. My brain cannot remember the exact terms used right now.
     
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  10. Doubeleive

    Doubeleive Supporting Member

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    hmm, interesting, I will have to check mine I have had suspicion that some of my poor fuel mileage has to do with low fuel pressure, my fuel pressure runs at 45 with the engine running which seems to be the bare minimum required. I see some reporting 50-55 but mostly on the nbs's, the fuel pumps on the nbs's are rated for 100k the dealer told me the nnbs pumps go farther but i never got a official rating. mine has 125k on it as far as I know.
    pre-start mine will be 65lbs
    running it is only 45lbs
     
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