Results 1 to 3 of 3

Thread: Replacing Flash, now PCM won't turn on?

  1. #1
    Lifetime Member N0DIH's Avatar
    Join Date
    Jan 2006
    Posts
    467

    Default Replacing Flash, now PCM won't turn on?

    I just off board flashed the 28F400 for my 9354896 PCM and my 0411 PCM, and neither will turn on. I have tried several different flash files, nothing, it won't turn on.

    Anyone know if there is any sort of strange security mode that I may have triggered?

    I am trying to fix a PCM for someone that when the PCM was flashed, it bricked the PCM. It isn't making sense.

    I have tried to read the PCM with Winflash and EFILive Scan (using my Autotap cable), no dice.
    I owned a Ford once, ONCE.......

  2. #2
    Lifetime Member swingtan's Avatar
    Join Date
    Jul 2007
    Posts
    1,589

    Default

    Any chance you damaged the board when removing the chip? What about solder shorts on the legs? I take it you have done this before....

    Simon.

  3. #3
    Lifetime Member N0DIH's Avatar
    Join Date
    Jan 2006
    Posts
    467

    Default

    Not saying no way, but 3 PCM's, and 4 different 28F400's, all doing the exact same thing. I am puzzled. If I connect my 2000 Park Ave Ultra stock PCM up, 09380717 PCM, all is fine. So my interface is ok. It is like the PCM doesn't want to boot.

    I put in code that I personally read off a 28F400, and have program that code into a PCM that a person is using now, so the code is good (good enough he was able to do a full flash after I sent it to him).

    My eyes certainly aren't what they used to be, and I don't have a microscope like I used to have, but the part is going on nearly as clean as GM's supplier for it.

    The burner is reading the 28F400's ok, not seeing issues on that side.
    I owned a Ford once, ONCE.......

Similar Threads

  1. Won't flash
    By mijdirtyjeep in forum Duramax LB7
    Replies: 12
    Last Post: October 31st, 2010, 12:48 PM
  2. PCM Flash to Grand-AM Cup PCM
    By Rusty in forum Gen III V8 Specific
    Replies: 36
    Last Post: January 5th, 2009, 08:58 PM
  3. PCM's generator exciter output (alternator turn on signal)
    By joecar in forum Gen III V8 Specific
    Replies: 1
    Last Post: February 21st, 2008, 12:10 PM
  4. Replacing the PCM (F-body)...
    By joecar in forum Gen III V8 Specific
    Replies: 5
    Last Post: August 15th, 2007, 01:24 AM
  5. 2000 gmc seirra 4.3 won't start after attempt to read pcm!!!
    By red12secz28 in forum General (Petrol, Gas, Ethanol)
    Replies: 2
    Last Post: September 20th, 2005, 12:58 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •