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Thread: Gen 2 Coyote - Digital Dash tach question.

  1. #1
    Join Date
    Mar 2016
    Location
    Deer Park, Texas
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    18

    Default Gen 2 Coyote - Digital Dash tach question.

    Due to Holley not controlling the 6R80 transmission, I went with a Ford Racing control pack. I'd like to use my existing 7" Digital Dash as a stand-alone unit. I'm trying to figure out how to get the tach to work. Has anyone figured this out yet? Can I take the coil trigger wire to the IO3 pin on the I/O connector? Thank you in advance, Matt
    Last edited by 1bad03snake; 03-08-2019 at 02:30 AM.
    1999 LSx swapped Mustang with a JY 5.3L, S475, Tick cam, Holley HI-Ram, TH400, FTI converter, Holley HP EFI

  2. #2
    Join Date
    Oct 2017
    Location
    Los Angeles
    Posts
    344

    Default

    Coil (-) internally uses IO3. Do not connect anything to IO3 if Coil (-) is used. RPM can be from a Coil (-) connection at pin B26, or a points/tach output at pin B5 which is IO3. Hope this helps.

  3. #3
    Join Date
    Mar 2016
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    Deer Park, Texas
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    I wired it up this way and the tach reads from 0 to 300 then jumps to 9000 RPM and bounces all around. I wired in an Auto Meter tach adapter today and now I get no reading at all. Any ideas?
    1999 LSx swapped Mustang with a JY 5.3L, S475, Tick cam, Holley HI-Ram, TH400, FTI converter, Holley HP EFI

  4. #4
    Join Date
    Dec 2009
    Location
    Connecticut
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    20,954

    Default

    Which Holley EFI Coyote system part number do you have?
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: Dominator MPFI & DIS, A/C, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/X-pipe/shorty headers, 100HP progressive dry direct-port NOS, 160A 3G alternator, Optima Red battery, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 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.

  5. #5
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    Mar 2016
    Location
    Deer Park, Texas
    Posts
    18

    Default

    I'm using the 7" Digital Dash as a stand-alone. If Holley ever supports a 6R80, I'll buy a Dominator again.
    1999 LSx swapped Mustang with a JY 5.3L, S475, Tick cam, Holley HI-Ram, TH400, FTI converter, Holley HP EFI

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