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Thread: Initial Startup No Spark, Ford TFI

  1. #1

    Default Initial Startup No Spark, Ford TFI

    I'm working through my initial startup checks. Trying to confirm mechanical timing matches ECU cranking timing at 15° and I'm not getting any spark from the coil. I have a SBF with TFI and Holley HP EFI. Here's a list of things I've checked so far. Looking for some other things to check.

    Ignition set to Ford TFI 8 Cylinder SEFI in Global Folder
    12V constant to red harness wire.
    12V crank and run to red/white harness wire.
    12V crank and run to TFI harness red wire.
    Ground to black wire to TFI harness.
    White wire on TFI harness to negative side of the coil.
    12V crank and run to positive side of the coil.
    TPS Autoset done twice.
    Data Monitor shows cranking RPM (157).
    Data Monitor shows all sensors normal.
    New coil.
    tried two different supposed good distributors.
    Battery charged to 12.4V.
    I'm not very familiar with TFI, but I think I understand that I should be getting a momentary ground on the white wire from TFI harness to the negative side of the coil when the distributor spins to fire the coil, which I am not.

  2. #2
    Join Date
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    The TFI module's white wire signals the MSD CDI box white wire. See the Ford TFI wiring diagram:
    http://documents.holley.com/techlibr...10555rev17.pdf (Holley EFI Wiring Manual - Figure 6, Page 15)
    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. #3

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    I'm not using an aftermarket ignition box (MSD or Holley). I used the wiring diagram on figure 5, page 14. Is that correct?

  4. #4
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    Yes, that's correct for your application. I don't know why it's not working. I'd record & review a System Log.
    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. #5

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    Thanks as always for the replies, I'll keep digging!

  6. #6
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    https://forums.holley.com/showthread...617#post213617 (Related Forum Post)
    http://forums.holley.com/showthread....s-amp-Datalogs (Datalog & System Log Information)
    http://forums.holley.com/showthread....5760#post45760 (Scroll Down To "Typical No-Start Checks".)
    http://forums.holley.com/showthread....ents-Read-This! (Initial Checks & Adjustments - Read This!)
    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.

  7. #7

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    SOLVED! Running back through all the connections, for some reason the TFI connector to the TFI module on the distributor didn't feel right. Seemed loose. Replaced the connector and Presto! All good now.

  8. #8
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    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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