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Why do I sometimes get datalog files that look like this? This was recorded during a 20 minute drive.
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Last edited by TRP; 10-04-2017, 10:19 PM.2004 Chevy Avalanche converted to 2WD, LSX 429, ETP LS7 6 bolt heads, twin TVS 1900 superchargers @ 20 PSI, 4L80E with brake, 9.5" SF rear with 3.73 gears, Dominator ECU -
Is that the Strip Chart or a Datalog? If these were PC (laptop) recorded datalogs, as opposed to internal (ECU) datalogs, it was probably due to USB cable noise interference, or the laptop itself. This can also happen if the datalog "Logging Rate" (FPS) is set too high in Setup ECU Logging.May God's grace bless you in the Lord Jesus Christ.
'92 Ford Mustang GT: 385"/6.3L SBF, Dart SHP 8.2 block, forged steel crankshaft & H-beam rods, forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/.623" lift/114° LSA camshaft, TFS R-Series FTI Comp Ported intake, BBK 80mm throttle body, Holley Dominator MPFI & DIS, Holley 36-1 crank trigger, MSD 1x cam sync, PA PMGR starter, PA 200A 3G alternator, Optima 34/78 Red battery, 100HP progressive dry direct-port NOS, R134a A/C, Spal Dual 12" HP 3168 CFM fans, Frostbite 3-core aluminum radiator, Pypes dual 2.5" exhaust, off-road X-pipe, shorty headers, Earl's -6AN fuel system plumbing, Walbro 255 LPH in-tank pump & Pro-M -6AN hanger, S&W subframe connectors, BMR upper & lower torque box reinforcements, LenTech Strip Terminator wide-ratio Ford AOD, 10" 3000 RPM C6 billet converter, B&M Hammer shifter, Stifflers transmission crossmember & driveshaft safety loop, 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. -
This a 100MB DLZ datalog file that was downloaded from the ECU.
EDIT: Could be that something gets lost during download, because I downloaded it again today and I got a normal looking datalog file. Last time I tried to download a file again, it was still messed up on the second attempt.Last edited by TRP; 10-05-2017, 12:44 PM.2004 Chevy Avalanche converted to 2WD, LSX 429, ETP LS7 6 bolt heads, twin TVS 1900 superchargers @ 20 PSI, 4L80E with brake, 9.5" SF rear with 3.73 gears, Dominator ECUComment
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Yes, the tracebacks are a sign that the timing on the datalog was "lost" at some point. It happens more frequently on the Sniper EFI system because it can't associate a Real Time Clock stamp with the data sample. It only has a data count, and if you get enough RFI to reset the ECU the data count is reset as well and, swoosh, the trace goes back to the start.
In this case, I'm guessing that something got corrupted in the conversion from the zipped DLZ to the unzipped DL file. Probably not worth worrying about unless you see it happen again.Comment
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