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Thread: Changing calibration for E38 ECU

  1. #1
    New Member
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    Dec 2017
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    Default Changing calibration for E38 ECU

    I am going to explain my problem with an example:

    I have 2 E38s:

    No 1 Is a "2012 Chevrolet Silverado 1500 with a 6.2L V8 OHV 16V FFV" with the following VIN & Calibration Info:

    VIN 3GCUKSE24CG305387
    Engine Gen-IV V8
    Transmission 6L80E Auto
    PCM flash 2MB
    Operating System 12653249
    Calibration 12653852
    OS ID AA
    Cal ID
    BCC ABHB
    OS Level
    Cal Level
    Cal file name 12653249.calz
    Cal file version 7.60
    Cal file date 18th September, 2017
    Operating System 12653249 $A8C797C0
    Engine Operation 12640866 $4122698A
    Engine Diagnostics 12640903 $C6552E48
    Fuel System 12640909 $68FB7297
    System 12640930 $3CBC513A
    Speedometer 12640959 $D3AB7F2F

    The second ECU belongs to the same Year Make Model "2012 Chevrolet Silverado 1500 with a 6.2L V8 OHV 16V FFV" with the following VIN & Calibration Info:

    VIN 3GCPCSE29CG241793
    Engine Gen-IV V8
    Transmission 6L80E Auto
    PCM flash 2MB
    Operating System 12653249
    Calibration 12653852
    OS ID AA
    Cal ID
    BCC ABHB
    OS Level
    Cal Level
    Cal file name 12653249.calz
    Cal file version 7.60
    Cal file date 18th September, 2017
    Operating System 12653249 $A8C797C0
    Engine Operation 12640866 $208DD63E
    Engine Diagnostics 12640902 $DB842E26
    Fuel System 12640909 $68FB7297
    System 12640928 $EA1042E
    Speedometer 12640938 $83F4BDA2

    I don't know which calibration I should use to calibrate another E38 ECU with different VIN but same Year, Make & Model.

    Thanks for your help in advance.

  2. #2
    Joe (Moderator) joecar's Avatar
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    28,403

    Default

    They both have the same OS...

    so compare them using the V7 tunetool compare feature (open one of those tunes, open the other as the alternate tune, click the compare button)...

    look at the differences between the calibrations (post them here).

  3. #3
    New Member
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    Dec 2017
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    Red face

    Quote Originally Posted by joecar View Post
    They both have the same OS...

    so compare them using the V7 tunetool compare feature (open one of those tunes, open the other as the alternate tune, click the compare button)...

    look at the differences between the calibrations (post them here).
    Here is what I got:

    Comparison summary: 06:33:00 pm, Monday Dec 18, 2017

    Calibration comparison between E38 EFI Forum 4CG305387.ctz and 2012 Chevrolet Silverado 1500 with a 6.2L V8 OHV 16V FFV.ctz.
    *Values that differ by more than 0.000100% are considered different.


    12653249 "Operating System" N/A "Identical."
    12640866 "Engine Operation" N/A "Checksums are different, CAL: 4122698A<-> ALT: 208DD63E."
    12640903 "Engine Diagnostics" N/A "Part number is different ALT: 12640903."
    12640909 "Fuel System" N/A "Identical."
    12640930 "System" N/A "Part number is different ALT: 12640930."
    12640959 "Speedometer" N/A "Part number is different ALT: 12640959."
    B0164 "P.E Mode Delay RPM Bypass" 61.036088 "CAL: 0 <-> ALT: 5000"
    B0165 "P.E Mode Delay CTS Upper Bypass" 19.620050 "CAL: 21 <-> ALT: 121"
    B0169 "P.E Mode Ramp In Fuel" -22.500968 "CAL: 0.50 <-> ALT: 0.05"
    B3618 "P.E Mode Commanded Fuel" -0.049240 "Different from row 0 to row 32 inclusive."
    B5101 "High-Octane Spark Table" -1.568627 "Different from cell: 0,0 to cell: 32,32 inclusive."
    B5102 "Low-Octane Spark Table" -3.137255 "Different from cell: 0,0 to cell: 32,32 inclusive."
    B5104 "Base Idle Spark Table" -3.137255 "Different from cell: 0,0 to cell: 32,32 inclusive."
    B1906 "Knock Recovery Rate" -5.392157 "Different from cell: 0,0 to cell: 16,16 inclusive."
    B2501 "TCS Maximum Engine Torque" -6.103609 "CAL: 1600 <-> ALT: 600"
    B5208 "Rev Limiter Accel Modifier" 6.103609 "Different from row 9 to row 16 inclusive."
    B3315 "Skip Shift Minimum Temp" -86.150922 "CAL: 255 <-> ALT: 0"
    C6001 "DTC Type" N/A "Different from row 202 to row 385 inclusive."
    C6002 "DTC MIL" N/A "Different from row 202 to row 385 inclusive."
    H0105 "ECM Pulses per Kilometer Output Rate" -0.056176 "CAL: 405 <-> ALT: 404"
    H0135 "Tire Size Correction" -2.860239 "CAL: 87551 <-> ALT: 80053"
    H0136 "Tire Revolutions Per Kilometer" -0.106813 "CAL: 405 <-> ALT: 404"
    H0139 "Driven Wheel Rolling Circumference" 0.000233 "CAL: 2468 <-> ALT: 2475"
    H0140 "Non Driven Wheel Rolling Circumference" 0.000233 "CAL: 2468 <-> ALT: 2475"
    H0122 "Axle Ratio" -4.427742 "CAL: 3.73 <-> ALT: 3.42"
    H0125 "Front Axle Drive Ratio" -4.427742 "CAL: 3.73 <-> ALT: 3.42"
    H0129 "Speed Limiter" -69.001297 "CAL: 511 <-> ALT: 158"
    H0155 "Speed Limiter 4WD Low" -18.023957 "CAL: 250 <-> ALT: 158"
    H0130 "Speed Limiter, RTD Failed" -69.001297 "CAL: 511 <-> ALT: 158"
    H0131 "Speed Limiter, Comms Failure" -69.001297 "CAL: 511 <-> ALT: 158"
    H0156 "Speed Limiter Source" N/A "CAL: ECM <-> ALT: Other Module"
    H0161 "Speed Limiter Min Speed" 19.072251 "CAL: 15 <-> ALT: 113"

    I also uploaded the .csv file (I tried to attach the file but the it didn't let me) Here is the link:

    https://docs.google.com/a/npcautomot...it?usp=sharing

    Please let me know if I should provide more information and thanks in advance my friends

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