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Thread: Computer Dies after Write calibration

  1. #1
    Senior Tuner Ben Charles's Avatar
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    Computer Dies after Write calibration

    Working on a customers 408 LSX engine in a 80's model Camaro. Read the computer then wrote the tune. Once my tune is wrote the fuel pump only runs for half a second and WILL NOT CONNECT to scanner or to write another calibration. IVE DONE THIS ON 2 computers now and I don't know what else to try. Even tried to recover the ECU in a truck using his wiring harness like a bench harness and I can't recover anything due to it not connecting to the scanner.

    Any insight, at this point Im lost, don't know what's going on.

    Here is my First base tune for this setup.

    payton408pulledben1.hpt

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    96 TA Blown/Stroked, 4L80E/Fab 9
    15 C7 A8 H/C 2.3 Blower/PI
    14 Gen 5 Viper
    Custom Mid Engine chassis, AKA GalBen C

  2. #2
    Senior Tuner Ben Charles's Avatar
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    stockpulled00.hpt

    Here is the original tune. I talked to the boys at FAST this morning due to there 57lb injectors. For anyone reading this don't buy there injectors they are just drilled injectors and now data exist. I'm usually pretty good at coming up with info, but this is the second car in 1 week with FAST injectors that I have had problems with.

    Email Tunes, [email protected]
    96 TA Blown/Stroked, 4L80E/Fab 9
    15 C7 A8 H/C 2.3 Blower/PI
    14 Gen 5 Viper
    Custom Mid Engine chassis, AKA GalBen C

  3. #3
    Advanced Tuner Montecarlodrag's Avatar
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    I think it was the Vss Output Pulses Per Mile
    You have it set to a low value, some PCM's can't have a small value because they get bricked when flashed.

    You need to send the PCM to repair service

    http://www.hptuners.com/forum/showth...ss+output+mile
    9 sec Montecarlo SS

  4. #4
    my guess is the speedo output pulses is too low, this can fry the ECM. you should leave this at 4000.
    I count sheep in hex...

  5. #5
    Advanced Tuner Shrek's Avatar
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    Concur ... read a similar issue on the EFILive Forum awhile back

    http://forum.efilive.com/showthread....meter+settings

  6. #6
    Senior Tuner Ben Charles's Avatar
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    Hmmm should have put that back to stock, that was modded prior, didn't think much of that number as long as the other ones were correct. Wonder why it didn't brick anything while it was done in the first place?? A Tech II can unbrick these right??

    Email Tunes, [email protected]
    96 TA Blown/Stroked, 4L80E/Fab 9
    15 C7 A8 H/C 2.3 Blower/PI
    14 Gen 5 Viper
    Custom Mid Engine chassis, AKA GalBen C

  7. #7
    Advanced Tuner Montecarlodrag's Avatar
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    Quote Originally Posted by Ben Charles View Post
    A Tech II can unbrick these right??
    Unfortunately no.
    A pcm in this state loses all communication with the outside world. OBD-II flash is not possible, you need to send them for repair.
    9 sec Montecarlo SS

  8. #8
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    Quote Originally Posted by Montecarlodrag View Post
    Unfortunately no.
    A pcm in this state loses all communication with the outside world. OBD-II flash is not possible, you need to send them for repair.
    This car ran on the original file , was in another mud tck before this Camaro.