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    I'll do this and report back - hopefully to close...

    I'll do this and report back - hopefully to close this thread. :thumb_yello:
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    20396 I had the same experience again today. ...

    20396

    I had the same experience again today.

    This time I did a cal flash after changing about 4 DTC settings-nothing else. After the flash it would not start and I had to go back to the same...
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    The manufacturer of the kit will have a...

    The manufacturer of the kit will have a recommended distance to mount the O2 sensor. To close or far away from the manifold(s)/turbo can affect the accuracy of the readings. Read the install...
  4. Reading material: GM Vehicle control systems history

    I saved this article many years ago. It's Written by Tom Boynton ( no idea who he is?) His article is interesting and sheds some light on the evolvement of engine control.

    Enjoy.

    (see attached...
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    lexus technician has no obligations to help....

    lexus technician has no obligations to help. (anyone)

    http://troubleshootmyvehicle.com/gm/4.3L-5.0L-5.7L/pcm-connector-pin-outs-1996-1997-page-1
    ...
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    http://www.gmtruckcentral.com/articles/12200411.ht...

    http://www.gmtruckcentral.com/articles/12200411.html
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    Saving as V8 when using V7.5?

    V1.2 cable
    V7.5.7 Build 296
    LS1B PCM

    Did some changes to a tune (and saved as different name) and tried to cal flash -but the truck did not start. So I tried a full flash of the previous tune...
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    Thanks guys for helping get this resolved. The...

    Thanks guys for helping get this resolved.

    The key Paul sent worked. :thankyou2:
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    Bootloader locked on LS1B using V1.2

    Just trying to read LS1B PCM and get the "bootloader locked" pop up. PCM checks out okay. -I was in this PCM in the past with no connectivity issues.

    When checking PCM security- it states PCM...
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    If it's any consolation I have always had these...

    If it's any consolation I have always had these symptoms with COS3/ V1. It will also do it when the battery is disconnected/reconnected?

    Just thought this was normal "re-learning" of the PCM?
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    V1 alt calibration

    Good to know -thanks for the speedy response ! :)

    The next perplexity imagined is this:

    What if -using V1 I have a .CVT file loaded (EFILive tune) and I load an alternate .TUN file to compare....
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    The only thing I noticed (so far) about this...

    The only thing I noticed (so far) about this extension change ordeal (.TUN vs .CTZ) is the file size is smaller with the .CTZ.

    Meaning, when I have a .TUN file @ 475KB and it saves as a .CTZ ...
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    On this screen you can activate what modules you...

    On this screen you can activate what modules you what to clear. Are the modules active when it is greyed or white?? (Using V1)

    FWIW, EFI should change the programming so that it turns green when...
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    1 Bar MAP sensors are used on NA (naturally...

    1 Bar MAP sensors are used on NA (naturally aspirated) vehicles.

    2 Bar MAP Sensors are used on forced induction vehicles(Turbo & Supercharged). They can measure up to 2x the atmospheric...
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    Sticky: Q:? Does MAF and SD use the same idle tuning...

    Q:? Does MAF and SD use the same idle tuning methods in this thread?
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    I would stick with the info that came with the...

    I would stick with the info that came with the injectors. Are the injectors new, or are they used and have been sent for flow testing?
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    V7.5 Auto VE supplied files

    Using Tune V7.5.7 and scan V7.5.7 (COS3 with V1 cable) for Speed Density

    From EFIlive Scan V7.5:

    Can't we just take from the F11 / open new map file use the "autoVEprimary. map" file? -and...
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    http://forum.efilive.com/showthread.php?4661-Idle-...

    http://forum.efilive.com/showthread.php?4661-Idle-Tuning-Helpful-Info-Inside

    Thought I saw a tutorial or sticky on big injectors too somewhere?
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    Having a problem working offline from laptop -not...

    Having a problem working offline from laptop -not connected to vehicle using V1? (using COS3)

    When connected to vehicle there are no problems?

    It will not let me "save as" (not highlighted in...
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    Shouldn't this be a constant instead of a...

    Shouldn't this be a constant instead of a variable in the converter tables? :confused:

    I adjusted the IFR and raised the fuel pressure to 45 psi (from 42) Although I have not done auto VE yet...
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    Where do I get this value? The injector FLOW...

    Where do I get this value?

    The injector FLOW rate is available (also assuming this is 80% duty cycle)
    Fuel rail pressure is available too ( As I control this via fuel regulator)

    Injector...
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    Update Nov. 20

    Update:

    Initial start up was really rough and rich. So I wound up lowering the values in the B4001 table. In hind sight, the original values would probably work if I let the PCM learn a bit. I...
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    Check your vacuum lines.

    Check your vacuum lines.
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    Was hoping to load it this weekend. The truck...

    Was hoping to load it this weekend. The truck ran well with the existing spark tables, but it is only when it went into boost things unraveled. Can't wait to try this out!
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    Thank you for the feed back guys -keep it coming....

    Thank you for the feed back guys -keep it coming.

    The engine is a stock GMC Typhoon. 4.3 V6. 285 hp @ 4400 RPM :350 ft/lbs At 3200 RPM : Redline @ 4800 RPM (These values from factory) I believe...
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