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Thread: C950 help!

  1. #11
    68Bird Guest

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    I've got the yellow/black wire tied to the tach lead from the MSD. Should it be somewhere else?

  2. #12
    Join Date
    Dec 2009
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    Connecticut
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    22,675

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    Quote Originally Posted by 68Bird View Post
    I've got the yellow/black wire tied to the tach lead from the MSD. Should it be somewhere else?
    That seems correct. Does your tachometer work, wired like that? Is there a dedicated tach wire with the MSD 6AL?
    http://www.holley.com/data/Products/...99R10149-7.pdf (C950 Pro manual)
    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.

  3. #13
    68Bird Guest

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    Yes, all works fine. I can unplug ECU, leave the rest of harness installed, switch fuel pumps, & reinstall carburetor and car runs great.
    I have tried attaching yellow/black wire to the negative coil post as well with no change.

  4. #14
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    Quote Originally Posted by 68Bird View Post
    Yes, all works fine. I can unplug ECU, leave the rest of harness installed, switch fuel pumps, & reinstall carburetor and car runs great.
    I'd guess a wiring problem or a defective ECU.
    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.

  5. #15
    68Bird Guest

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    I'll get with Holley tech about the firmware, and while they have the ECU, I'll verify all connections, test continuity, & all that fun stuff.
    Thank you greatly for your help, and if it ever gets up and running I'll most likely pester you for more help with fuel maps. (Don't see any Mopar maps.)

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