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Thread: Missing Data

  1. #1

    Default Missing Data

    My system has begun to skip approximately .3-.4 seconds of data near the 4 second mark. Notice ALL the data is missing, RPM - RTC all. It doesn't have a miss or interfere with the run in any way, just skips in the datalog. Sample datalog attached.
    Attached Files Attached Files

  2. #2
    Join Date
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    Are these Internal (ECU) Datalogs, or PC (laptop) Datalogs? https://forums.holley.com/showthread...g-Datalog-Info (Related Forum Thread)
    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

    Default

    ECU at 300 FPS. I can try to lower that. But it just seems odd that it has that dead spot in 90% of my datalogs. Consistently .3 -.4 of a second and right at 4 seconds after transbrake release.
    Last edited by BoostedCP; 10-17-2019 at 01:04 PM.

  4. #4

    Default

    Yes, that is odd and you can try lowering the FPS. I don't see anything of concern. Normally, if it was right after transbrake release, that indicates wiring issues (inductive spikes) that aren't addressed properly. But this is well after. I don't see voltage issues. Diag #6-#9 are not incrementing.

  5. #5

    Default

    Forgive me, but what is Diag #6-#9? I added them to my graph setup and see them as well as the other Diagnostics, they all seem flatlined. I'm new to Holley, new to ECUs in general. A little background. This is on a blow-through carb deal. It's happened since going to this ECU (March this year), but has progressively gotten more frequent, not worse. Same .3-.4 of a second, but had been earlier in the run and even while on two step. When I noticed it originally, it was only about 10% of my datalogs had this issue. But my last outing 10/12 all five datalogs have this dead spot, consistently .3-.4 at about 4 seconds in. So I may be to 100% of the time now.

  6. #6
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    Quote Originally Posted by BoostedCP View Post
    Forgive me, but what is Diag #6-#9?
    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 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

    Default

    Thanks! Good info.

  8. #8
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    22,893

    Default

    You're welcome.
    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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