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  1. Replies
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    It would seem that you have not done much tuning...

    It would seem that you have not done much tuning or troubleshooting with mismatched components and calibrations - for customers that are extremely picky about how their custom vehicle functions.
    ...
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    As I have said before ... some 15-pin T42...

    As I have said before ... some 15-pin T42 operating systems seem to work OK (never perfect) when used to control a 13-pin 4L60 - other T42 operating systems will not consistently / correctly lock the...
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    T42 TCM OS 24231674 was used in the 2005 GTO. ...

    T42 TCM OS 24231674 was used in the 2005 GTO.

    T42 TCM OS 24236195 was used in the 2006 GTO.

    GM uses a numbering system (OS number) to catalogue calibrations.

    As OS updates (or new...
  4. As an initial caveat - I predominately work with...

    As an initial caveat - I predominately work with Hot Rods and custom vehicles.

    I have seen the "Service StabiliTrac" message appear in an OEM vehicle, that had a camshaft upgrade, followed by a...
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    With many T42 operating systems, using tuning...

    With many T42 operating systems, using tuning software like HPT to change the "ISS Fitted" parameter (TCM 492) from "Enabled" to "Disabled" - accomplishes the square root of bugger all.
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    The T42 TCM operating system (OS) that you are...

    The T42 TCM operating system (OS) that you are using (24235341) is intended for use with an ISS (15-pin 4L65).

    Coping over GTO settings does not address the issue of the numerous algorithms and...
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    I have been down this road a few times. A...

    I have been down this road a few times.

    A popular local transmission shop would only build 13-pin 4L65 transmissions (no ISS) for LS powered Hot Rods.

    These work fine when controlled by a P01...
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    I don't believe that HP Tuners has many of the...

    I don't believe that HP Tuners has many of the Fault Maximum Transmission Pressure triggers available for editing - if memory serves only the MAF related (i.e. if you fail the MAF to run in Speed...
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    With P01 PCMs paired with a 4L80 transmission,...

    With P01 PCMs paired with a 4L80 transmission, the OEM programming of the P1810 DTC when displayed in HP Tuners, is typically set to:

    - SES Enable box (no check mark)
    - Error Mode (No MIL Light)...
  10. Thread: p59 ac issue

    by Shrek
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    The linked thread requires soldering to the...

    The linked thread requires soldering to the circuit board inside the non IAC DBW P59 PCM.

    This requires a fair bit of skill - to effect quality solder joints, but without transferring too much...
  11. Thread: p59 ac issue

    by Shrek
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    Yes - the PCMs that have the IAC drivers - as I...

    Yes - the PCMs that have the IAC drivers - as I had indicated in my initial post.
  12. Thread: p59 ac issue

    by Shrek
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    How do you know that part of the issue is not in...

    How do you know that part of the issue is not in the tune ?

    SOP (standard operating procedure) on this Forum is to post your tune - that is, if you would like any actual help.

    If the P59...
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    Your fight is one of aerodynamics. Take a...

    Your fight is one of aerodynamics.

    Take a look at the nose of your 2012 Tahoe, then take a look at a 4 x 8 sheet of plywood - not much difference from a wind resistance standpoint (LOL).

    As...
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    The 1997 and 1998 "LS" PCMs use a single segment...

    The 1997 and 1998 "LS" PCMs use a single segment calibration. This means that you cannot swap calibration segments (as they do not exist) - like you could with the later PCMs.

    You will need to...
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    The HPT Gen 4 COS (Custom Operating System) was...

    The HPT Gen 4 COS (Custom Operating System) was something that HPT developed as an interim solution - while they were still sorting out the OEM VVE coding. Once HPT had developed a solid VVE...
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    No kidding. I do not disagree - that the...

    No kidding.

    I do not disagree - that the internet is a huge source of misinformation.

    However this was your quote to Fast4.7 ...




    Those parameters are indeed within the coding - so...
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    As you may know already, most tuning software...

    As you may know already, most tuning software only accesses a portion of the overall code within the OEM calibration.

    The OEM E38 and E67 calibrations both contain coding for the CKP Sensor and...
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    If Speartech sold you a kit that was supposed to...

    If Speartech sold you a kit that was supposed to support 8L90 TUTD function, then they need to sort this out for you. If you are unwilling to litigate this issue, then move on.

    Experimentation...
  19. Warming up my crystal ball ... You never...

    Warming up my crystal ball ...

    You never posted the original calibration from your 2009 G8 GT, nor the 2009 G8 GXP calibration that you have procured.

    However, if the OS is different, that...
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    Would you like some cheese with your whine ? ...

    Would you like some cheese with your whine ?

    You must find it difficult to walk around with your lower lip dragging on the ground like a pouting 3 year old.

    Most professional tuners are self...
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    Haha - so many people purchase tuning software...

    Haha - so many people purchase tuning software thinking that everything is easy - and that they will be an instant expert.

    It is a bit like purchasing a scalpel and thinking that you are now a...
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    In a custom vehicle (Hotrod) using a Gen 3 PCM,...

    In a custom vehicle (Hotrod) using a Gen 3 PCM, or a properly matched Gen 4 / Gen 5 ECM and TCM combination, there is no need to add a resistor to the communications bus. Most aftermarket LS / LT...
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    No - not remotely correct regarding a 2018 6.0L...

    No - not remotely correct regarding a 2018 6.0L (Gen 4).




    No - not remotely correct regarding a 2018 6.0L (Gen 4). These have an ECM (engine control module) and a TCM (transmission...
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    Are you still getting the P0122 and P0223 DTCs...

    Are you still getting the P0122 and P0223 DTCs with the Corvette APP ?

    If so, then confirm that the APP connector is pinned for a Corvette (Trucks are different).

    In any computer controlled...
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    You are using a 2009+ Corvette throttle body...

    You are using a 2009+ Corvette throttle body (gold blade), a 2013 Corvette calibration in the E38 ECM, and a Nissan APP (accelerator pedal).

    I wonder what the root cause could be ?

    Yet...
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