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Thread: Digital Dash Fuel Level Gauge

  1. #11
    Join Date
    Dec 2009
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    Connecticut
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    You're welcome. Glad you found it.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  2. #12

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    Do any of the "ground" pins on the I/O Harness need to be connected for the fuel gauge to work properly? I have followed all instructions to the best of my knowledge, however, I still get some fluctuation when the fans kick in. Wondering if I missed a step, or misread the instructions for the I/O Harness. Thanks, Tom

  3. #13
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    Dec 2009
    Location
    Connecticut
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    22,740

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    Quote Originally Posted by tangel View Post
    Do any of the "ground" pins on the I/O Harness need to be connected for the fuel gauge to work properly?
    No, but the ground needs to be a good ground. Actually, everything needs to be well grounded (it's a common problem). Here's just one example: LINK.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  4. #14

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    Awesome, thanks for pointing me in the right direction, much appreciated! Tom

  5. #15

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    Quote Originally Posted by tangel View Post
    Awesome, thanks for pointing me in the right direction, much appreciated! Tom
    I realize this thread is a couple months old, but did you solve the problem? We're experiencing the same thing on a '93 Mustang & I've checked every ground I found & even added extra ones & the problem still exists.

  6. #16

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    No, I never got it to work right. I even bit the bullet and went with the I/O Adapter. I have the Holley GPS now, and can track mileage for gas consumption. I think the sending unit for a 1964 Dodge is just not compatible with the system. I tried tons of things and never could get it right.

  7. #17

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    I'm working on this now. I'm trying to set it up through the HP EFI input. I set it up as a 0 to 20V input. I have the gauge laid out, now messing with the wiring. I don't really care if the gauge fluctuates, as long as it gives a decent reading that will indicate if the tank needs fuel or not. I'm running a 12V signal to the sender, then returning that to the input through the I/O Auxiliary Harness on the HP. I'm NOT using the Digital Dash I/O Harness. I'm going to try it this way first and see how it works. It's on a '98 Mustang with a Coyote 5.0L in it. Any input or suggestions would be appreciated.

    UPDATE: An update to this. I set it up as a thermistor per Danny's recommendation, and updated my software on the HP and the Digital Dash. Set rate to slow and 1/S, and gauge works well. Doesn't bounce and seems to be accurate.

  8. #18
    Join Date
    May 2017
    Posts
    1

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    Good info!

  9. #19
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    Quote Originally Posted by nxcoupe View Post
    UPDATE: An update to this. I set it up as a thermistor per Danny's recommendation, and updated my software on the HP and the Digital Dash. Set rate to slow and 1/S, and gauge works well. Doesn't bounce and seems to be accurate.
    Thanks for the update.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

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