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Thread: Flashhack - New LT1 flash tool

  1. #316
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    That solves the mystery.

    Best regards

  2. #317
    LT1 specialist steveo's Avatar
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    you know from what i saw from the other P66 masks a lot of tables are in the same place.
    i betcha what you could do is delete all the XDF tables and constants that aren't obviously real
    then go and find the VE and spark tables manually (they are usually pretty obvious shapes and probably the same dimension as the other P66 masks)
    that should make it capable of a basic tune
    just an idea

  3. #318
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    It seems to me that when I tried using the P66 V6 XDF on a 93 Fbody ECM one of the VE or SA tables appeared to read correctly (cant remember which one) and the other one was garbage. When using the 94/95 P66 V6 XDF on a 93 Fbody ECM some of the data appears to be correct but not sure if it is, so creating an XDF for the 93 may not be that difficult. Maybe just tweaking the 94/95 XDF can be done. I know nothing about that stuff. In my application I needed more than those 2 tables. The 93 Fbody ECM is the only one that uses the 3.4l with a 700R4 transmission (non electronic). The 94/95 uses the electronic version of transmission. It would have been the perfect choice for my application.

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    I just needed to adjust radiator fan on and off temperature but these these are totally mixed up and I know nothing in making xdf's.

  5. #320
    LT1 specialist steveo's Avatar
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    posted a new version of flashhack, mostly minor bugfixes, took the 'beta' thing off of it since no real issues.

    i did add an aldl cable tester tool that checks for consistency and latency, mostly so i have something to run when people are complaining about not being able to connect. it also identifies counterfeit ftdi chips and warns you (although i run counterfeits and they work great)

  6. #321
    LT1 specialist steveo's Avatar
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    here are some example test results of a working cable, if you get very different results please post them:

    Code:
    Examining interface COM3...
    USB Serial Port - FTDI
    Serial# A50285BIA
    VID/PID: 403/6001
    WARNING! Your FTDI interface is probably counterfeit.  This may not be a real problem, but if you have issues, you may have to try another.
    The bus has been silent for two seconds.
    Test data: 10 chunks @ 1b
    Test latency results: TX=0ms  TX/RX=14ms  RX=14ms
    Test data: 12 chunks @ 2b
    Test latency results: TX=0ms  TX/RX=15ms  RX=15ms
    Test data: 20 chunks @ 3b
    Test latency results: TX=0ms  TX/RX=15ms  RX=15ms
    Test data: 10 chunks @ 32b
    Test latency results: TX=0ms  TX/RX=15ms  RX=47ms
    Test data: 10 chunks @ 64b
    Test latency results: TX=0ms  TX/RX=15ms  RX=79ms
    Test data: 8 chunks @ 150b
    Test latency results: TX=74ms  TX/RX=0ms  RX=116ms
    Test data: 4 chunks @ 400b
    Test latency results: TX=386ms  TX/RX=0ms  RX=108ms
    Test data: 1 chunks @ 1000b
    Test latency results: TX=1088ms  TX/RX=0ms  RX=141ms
    All tests OK.  This interface should be safe to use.  No warranty.

  7. #322
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    Re: Flashhack - New LT1 flash tool

    Hey guys, long time lurker. Love this place.
    I currently have a 1996 Corvette BCM on the bench. Eprom removed and in my Willem GQ4x4. I've read it as 27C512. I don't get clear data and cannot find the vin. I'm purely trying to make a backup. Can anyone shed some light on this and help figure out how I could make a legit backup just in case?

  8. #323
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    Re: Flashhack - New LT1 flash tool

    The eeprom the vin, odometer and options are store in is integral to the 6811 processor. That uveprom contains the operating system.

    Don't take this to the bank, but I think those '96 CCMs are still 8192 baud serial. That's the protocol flashhack speaks and what you will need to use to read / write the eeprom.

    Maybe someone more familiar with the '96 Y body can chime in, but I think only the PCM is class 2 VPW. If the rest of the car went to class 2 in '96 then you're not going to talk to that with flashhack.

  9. #324
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    Re: Flashhack - New LT1 flash tool

    I suppose Justin Graham is the one of the member of this site but i can not remember his nickname has an solution called "LT-Flash" which has ability to read/write, unbrick with bench harness of OBDII 96-97 PCM's . I'm not sure should i have to share or not a link from another platform over here but you can search "LT-Flash" on net and get in touch with him to find an answer to your questions.

  10. #325
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    Re: Flashhack - New LT1 flash tool

    So there’s no current known way to backup the data manually? My reason for this is my dads 96 needs a bcm apparently I’ve already pulled the chip anticipating the eeprom transfer to another unit. Should I pull the 6811 too or is that pointless considering they probably talk to each other? I guess I could wire up a bench harness for this but I’d REALLY rather just transfer everything manually.

  11. #326
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    Re: Flashhack - New LT1 flash tool

    Any ideas here?

  12. #327
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    Re: Flashhack - New LT1 flash tool

    96 is using aldl protocol for body modules, only pcm is vpw.

    You should be able to read the bcm content using the mode 2 commands. It is built in flashhack debug tools.
    Not sure how to handle connection an aldl cable+ bench setup, or pin 9 at obd2 connector for aldl and pin 4+5 for ground.

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