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Thread: OS 09381344 - Trying to perform Calc.MAFT

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  1. #1
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    Default OS 09381344 - Trying to perform Calc.MAFT

    Background:
    This is a stock 2000 5.7 LS1 with a 4L60E in a '58 vette chassis. The only modifications are:
    1) 3" exhaust
    2) Modified intake tract
    3) 5 wire MAF replaced the original 3 wire MAF (the aftermarket harness came wired for a 5 wire).

    The MAF Sensor Calibration (B5001) was modified with the values from a stock 5 MAF sensor.

    The car drives okay under 40% throttle, anything beyond that it starts to fall flat and break up as if it's running rich.

    Is there more that I am overlooking with the few modifications I described above. I anticipated the car to run fairly well without the need of tuning.

    All that being said, I'm now looking at what will be needed to perform the Calc.MAFT tuning process with this OS. I chose the Calc.MAFT as it disables the MAF, which I'm curious how that alone may change the behavior of the car. I assume that disabling the MAF will 'fail the tune' based on the MAF DTC and force the tune to use the VE instead ?

    First thing the Calc.MAFT process mentions is the OS needs to support GM.VETABLE_DMA in units "g*k/Kpa". What I see with this Operating System is VETABLE_M which is in units 've'. Will VETABLE_M work in it's place ?

  2. #2
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    Also looking for some insight as to why I'm not getting any data for EFILive V2 AD1 when trying to log INNOVATE LM2 analog WBO2 output into the EFILive analog 5V inputs. Testing voltage with a volt meter at the orange connector coming into the bottom of the EFILive V2 shows 5 volts. Nothing shows up in the datalog under AD1 ?

  3. #3
    Joe (Moderator) joecar's Avatar
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    Have you got all the calc pids from the Calc.MAFT tutorial selected in the scantool?

  4. #4
    Joe (Moderator) joecar's Avatar
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    If you full flash OS 12212156 you will get the pid GM.VETABLE_DMA.

  5. #5
    Joe (Moderator) joecar's Avatar
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    Disabling the MAF requires that the DTC is not ignored in table C6001/6002.

  6. #6
    Joe (Moderator) joecar's Avatar
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    Do you have the LM2 ground connected to the ground pin on the orange connector?

  7. #7
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    Quote Originally Posted by joecar View Post
    Can you flash the original factory tune that goes with this engine/trans? Or you could flash in the stock 2002 F-car 12212156 factory tune.
    I believe I have the original calibration with the 3 wire MAF settings. This is definitely worth a try for grins.

    Quote Originally Posted by joecar View Post
    Have you got all the calc pids from the Calc.MAFT tutorial selected in the scantool?
    I do not, there were several that were not available with the 09381344 OS

    Quote Originally Posted by joecar View Post
    If you full flash OS 12212156 you will get the pid GM.VETABLE_DMA.
    Thank you, I'll have to try and get my hands on this operating system.

    Quote Originally Posted by joecar View Post
    Disabling the MAF requires that the DTC is not ignored in table C6001/6002.
    Got it, thank you.

    Quote Originally Posted by joecar View Post
    Do you have the LM2 ground connected to the ground pin on the orange connector?
    I do have I do have Analog2 +/- (Brown/white and Dark Green) connected. Are you suggesting there should be a 3 ground wire ?

  8. #8
    Joe (Moderator) joecar's Avatar
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    Can you flash the original factory tune that goes with this engine/trans? Or you could flash in the stock 2002 F-car 12212156 factory tune.

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    Quote Originally Posted by joecar View Post
    Can you flash the original factory tune that goes with this engine/trans? Or you could flash in the stock 2002 F-car 12212156 factory tune.
    I just loaded a PCM with a stock 12212156 OS from a 2002 corvette 4l60E using a benchtop harness. I still don't see GM.VETABLE_DMA or numerous Calc.MAFT PIDs from the tutorial. Although within the tutorial they are referenced as Calc.VET PIDs, which is a little confusing ?

    Also, I'm still unsure on where to put the "calc_pids.txt" file with V8 and if the file name is still accurate for V8.
    I assume it might get copied here ?
    C:\Users\twada\Documents\EFILive\V8\User Defined PID\calc_pids.txt

    I appreciate your continued assistance as I struggle through this.

  10. #10
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by ticker View Post
    I just loaded a PCM with a stock 12212156 OS from a 2002 corvette 4l60E using a benchtop harness. I still don't see GM.VETABLE_DMA or numerous Calc.MAFT PIDs from the tutorial. Although within the tutorial they are referenced as Calc.VET PIDs, which is a little confusing ?
    You may have to do Info->Validate in the V7 scantool.

    Also, I'm still unsure on where to put the "calc_pids.txt" file with V8 and if the file name is still accurate for V8.
    I assume it might get copied here ?
    C:\Users\twada\Documents\EFILive\V8\User Defined PID\calc_pids.txt
    calc_pid.txt is fot V7 only.

    V8 has a user interface that lets you define the calc pid using syntax that is different than V7.

    I appreciate your continued assistance as I struggle through this.
    No worries.

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