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Thread: No RPM signal after firmware update.

  1. #21
    Join Date
    Dec 2009
    Location
    Connecticut
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    25,561

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    Contact Holley Tech Service (LINK).
    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.

  2. #22

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    Just to update. Borrowed a friends HP and got the software loaded for his build version. Didn't have the fuel system hooked up as I'm in the middle of changing pumps. But did hook it up and tested to see if it had cranking RPM, and sure enough it did. So guess I'll be looking for another ECU as evidently the original one is toast.

  3. #23

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    OK. So finished the fuel system over the weekend and gave it a try with the new ECU. Now it shows Sync, then flashes an RPM reading then says Error and cycles back through that sequence again still no fire. Trying a new crank sensor tonight and I'll check the wires for the sensor.

  4. #24

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    Just tried a known working crank sensor, same result.

  5. #25

    Default New ECU, no start.

    Posted on here prior having a no start issue after a firmware upgrade. Couldn’t find an issue. Borrowed a new ECU, downloaded the EFI software for it, redid a new tune file for it, did a TPS Autoset, have tried a new crank & cam sensor car still won’t fire. Prior to these issues the car ran for three seasons. Car cranks fine. Tach says sync, then will flash a RPM usually in the 700-900 range, which is way higher then it’s actually turning then will say error and keeps repeating that sequence. I’ve replaced everything short of the harness itself. Any thoughts?

  6. #26
    Join Date
    Nov 2014
    Location
    Ont. Canada
    Posts
    1,577

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    Did you do a System Log?

  7. #27

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    Ha, I’ve tried to do multiple System Logs. Tried doing Immediate along with Triggered watched the video on it a couple times now thinking I keep missing something, since I hadn’t done one in three years. But I can’t get one to show up in the downloads no matter what I try. All I get is a same single event log that has nothing on it.

  8. #28

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    Unplugged the harness to Ohms test everything. Couldn’t find anything out of the ordinary. Put a new battery and starter on it for the heck of it. Turns over way better, but still the same Sync, RPM, Error signal, and no start.

  9. #29

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    Quote Originally Posted by Rick Ryan View Post
    Posted on here prior having a no start issue after a firmware upgrade. Couldn’t find an issue. Borrowed a new ECU, downloaded the EFI software for it, redid a new tune file for it, did a TPS Autoset, have tried a new crank & cam sensor car still won’t fire. Prior to these issues the car ran for three seasons. Car cranks fine. Tach says sync, then will flash a RPM usually in the 700-900 range, which is way higher then it’s actually turning then will say error and keeps repeating that sequence. I’ve replaced everything short of the harness itself. Any thoughts?
    Can you test the ECU that you borrowed back in the system it came from? If it works back in its original system, then try your ECU to verify that it also works in a different car. That would rule out any problem with the ECU, the firmware or the tune, and would focus you back on the rest of your system.

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