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Thread: Voltage gauge reading incorrect Voltage

  1. #1
    Join Date
    Jul 2021
    Location
    Memphis TN
    Posts
    33

    Voltage gauge reading incorrect Voltage

    I just picked up a new to me Marauder. I noticed today that when idling the voltage reads around 11-12 and when driving it reads a little below 13. I hooked my volt meter to the battery and it was reading 13.2 with A/C at full blast and the car in drive with someone holding the brake. The voltage gauge was still reading around 11-12. Do these read low or go bad, generally?

  2. #2
    Join Date
    Jun 2003
    Location
    Timbuk3, MI
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    2,441
    Unless it's been replaced with a real guage, it's not more betterer than an IDIOT light.
    .

  3. #3
    Join Date
    Jul 2021
    Location
    Memphis TN
    Posts
    33
    Ok that's what I thought. I'll just replace that and the oil gauge with real autometer gauges. Thanks!

  4. #4
    Join Date
    Mar 2007
    Location
    Lehigh Valley, PA
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    5,956
    Quote Originally Posted by gdmjoe View Post
    Unless it's been replaced with a real guage, it's not more betterer than an IDIOT light.
    .

    How does one make a fake voltage gauge?


    2016 Ford Mustang GT PP - Lund nGauge, BMR vertical links, MGW Shifter, BMR CB005

    2004 Mercury Marauder - Eaton M112, Billetflow 3.4, Accufab SBTB + Plenum, T-56 Magnum, 4.10s, Stainless Works LTs, 2.5" Exhaust, Borla Stingers, Ridetech Coilovers + Adj rear shocks, FX-R projectors, Wilwood 13" BNSL6 + FNSL4 BBKs, S55 Gauge Cluster
    440rwhp & 406rwtq Tuned by Adam @ Revolution Automotive
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    (Sold) 2003 Mercury Marauder - Stainless Works LT's, Stainless Works 2.5" Catback, JLT Intake, Mo's Xcal4 Tune
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    2000 BMW M5 - Evolve Intake, Evolve Alpha-N tune, Stoptech ST-40 BBK, UUC SSK, Dinan front STB, Dinan RSB

    1996 Ford Bronco - 4" lift, 35" BFG A/T's, Punisher Valve Body, MH1 Projectors

  5. #5
    Join Date
    Jul 2021
    Location
    Memphis TN
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    33
    I took it as, he meant its not accurate.

  6. #6
    Join Date
    Jun 2019
    Location
    VA
    Posts
    164
    Voltage Gauge is real in a MARAUDER...

    Oil Pressure gauge is an "On/Off" Indicator, unless upgraded to AutoMeter Oil Pressure Gauge with sending unit.

    Your readings reported are not too far off from optimum, maybe have battery and alternator checked, for peace of mind.

  7. #7
    Join Date
    Jun 2008
    Location
    Waukesha, WI
    Posts
    1,604
    You "feel" the difference because you want to "feel" the difference. Since you just spent money on the upgrade you "have" to feel the difference

    I'm looking to eliminate the double pump process I have to follow right now to get the pedal hard

    2004 300A Procharger #0010 D1X
    2003 300A Procharger #0017 D1SC (SOLD. Last I heard, it was in Washington State)

  8. #8
    Join Date
    Nov 2014
    Location
    KC
    Age
    48
    Posts
    3,511
    My oem gauge reads at least 1 volt less than the LED usb cigarette lighter plug in with digital volt display.

    it’s like 5 bucks on Amazon
    The twins2.3 whipple/aluminatorVortech V-2 lots of goodies

    Current marauders
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