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Thread: Dominator no start.

  1. #1

    Default Dominator no start.

    What would the voltage be coming from crank sensor to ECU?

  2. #2

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    It'd help if you listed more information. What kind of engine is it? Andrew

  3. #3

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    LSx Next Dart block, 416, LS7 heads, Holley Dominator EFI 58x reluctor.

  4. #4

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    The 58x crank sensors are 5V. You should have close to 5V across the orange & black (ground) wires of the sensor. With the Dominator you should do a System Log to see what's happening with the cam & crank signals. Andrew

  5. #5

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    Yes sir, I have 5 volt, ground & 12 volts on signal wire from ECU. I've turned cam off and getting RPM & pulse at injectors. Why would turning off cam cause this to happen, and when on, it knocks out crank signal?
    Last edited by kyle 0523; 11-28-2020 at 09:54 PM.

  6. #6

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    Have you done a System Log?
    IG @projectgattago
    I offer remote Holley EFI tuning.
    I deliver what EFI promises.
    Please get in touch if I can be of service.

  7. #7
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    27,477

    Default

    Originally Posted by Danny Cabral
    If your crank or cam sync unit isn't transmitting a signal, troubleshoot the sensors, wiring, reference voltage & ground, reluctor,
    alignment, air gap (LINK), radial run-out problems (LINK), etc. If a regular datalog indicates an "RPM Error" when scrolling through
    the problem area, then it's time for a System Log to confirm which sensor flatlines. FYI: Crank & Cam A/D means Analog To Digital.
    It's not the +5V reference supply voltage. Troubleshooting 3-wire Hall-Effect sensors:
    https://www.yumpu.com/en/document/re...le-electronics (Understanding/Troubleshooting Hall-Effect Sensors - "Troubleshooting", Page 2)
    http://assets.fluke.com/appnotes/aut...e/beatbook.pdf (Fluke Multimeter Testing - "Hall-Effect Sensors", Page 17)

    Record a System Log to verify crank & cam sensor signals. Check mark the "RPM", "Crank" & "Cam" channels. Look for a uniform,
    uninterrupted crank or cam sensor signal pattern. The crank or cam sensor signal should never flatline (no pulse) or indicate an
    RPM "Error" anywhere. Also, fully charge the battery and ensure the engine is cranking fast enough, at least 100+ RPM. Another
    common issue, is trying to analyze a compressed view of a long System Log. Zoom In for detail - click & hold at one point of the
    datalog, and drag & release to another point nearby. It's best to record short System Logs/Datalogs that capture the problem.
    http://forums.holley.com/showthread....s-amp-Datalogs (Datalog & System Log Information)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 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, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, FPP aluminum driveshaft, FPP 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 M/T Street Comp tires.

  8. #8

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    Yes sir, I've been trying to get one loaded up, but it says Holley invalid file.

  9. #9
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    27,477

    Default

    This is a copy & paste from one of my other posts:
    Originally Posted by Danny Cabral
    For further assistance, post your Global File and a short datalog of this occurrence for us to analyze.
    Also, review the datalog and inform us of exactly where in the datalog (time/seconds) the problem occurs.
    Datalog & Global Files must be linked to a document hosting website. I use Dropbox.com.
    Files can also be "zipped" (compressed zipped folder) & attached directly to a forum post ("Go Advanced" & "Attachments").
    Your Global File is in the "Documents", "Holley", "HEFI V5", "Global Files" folder (.hefi file).
    Your Datalogs are in the "Documents", "Holley", "HEFI V5", "Datalogs" folder (.V5.dl file).
    Someone will analyze/troubleshoot the problem & offer advice. Also, ensure all this is right:
    http://forums.holley.com/showthread....ents-Read-This (Initial Checks & Adjustments - Read Steps #1-#6!)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 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, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, FPP aluminum driveshaft, FPP 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 M/T Street Comp tires.

  10. #10

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