Recent content by Rich Reno

  1. R

    2008 Denali XL possible ECM Failure?

    So... there is something wrong with the wire that runs from the ECM to the FPCM that has some kind of internal short in it somewhere. There is no damage to the loom, the wires, or anything from point A to point B, yet the signal never makes it to the FPCM. Ran a new wire and everything fires up...
  2. R

    2008 Denali XL possible ECM Failure?

    I figured out that it is just some weird thing with that pin and everything is fine. Regardless, the FPCM indicates that the engine never commands the pump to run. I got rid of the dorman module and got an AC delco one just to check. I saw some places to check the dark green/white stripe wire on...
  3. R

    2008 Denali XL possible ECM Failure?

    Ok, i am a bit stumped at this point. Reading with the tech 2, i can command the fuel pump to run, it give an output limit reached error, but it will read that it has pressurized the line up to about 400kpa. I can turn over the vehicle and it will run, but the fuel pump commanded state doesn't...
  4. R

    2008 Denali XL possible ECM Failure?

    Ok, finally had time to mess with everything and get it to actually communicate. When i go to the option to have it communicate with the modules, the ECM is listed as no comm, along with the FPCM. I tested the fact that i had communication by figuring out how to roll my window up and down. So...
  5. R

    2008 Denali XL possible ECM Failure?

    It would let me pick the make, model year and engine, but despite what i tried to read diagnostics on, eventually it was just like the program closed itself and i would have to start over. I was inputting the correct vehicle info, not sure if that was the problem or not.
  6. R

    2008 Denali XL possible ECM Failure?

    Ok, i finally got it to show the 22124708 connection, but whenever i pick something in tech2win that has to establish communication, then tech2win just closes the window after a few seconds.
  7. R

    2008 Denali XL possible ECM Failure?

    I am having trouble getting the vx to show in the tech2 connection options. through vx manager i see the device, but the option to install gds2/t2w through the manager fails. I downloaded and installed the t2w software from their page, but for some reason they don't see each other.
  8. R

    2008 Denali XL possible ECM Failure?

    I saw someone mention that, i think i actually have a a basic tds account and just didn't pay for it before once i realized that it wouldn't work with EFI live If i do have to program a new ecu, how difficult is that with tech2win?
  9. R

    2008 Denali XL possible ECM Failure?

    I just ordered one of these, should be in on Friday. Is there an intuitive guide to using it. And do I have to have a 32 bit system?
  10. R

    2008 Denali XL possible ECM Failure?

    So, picked up another FPCM when I was across town today. Plugged it in, and now the fuel pressure shows 38kpa, or from my math about 5psi. But when trying to connect EFI live to do DVT functions it is just stuck on this screen for 7.5. and when I try to connect with v8, then I get the other...
  11. R

    2008 Denali XL possible ECM Failure?

    Voltage is consistent at about 12 down to 11.5 while cranking, and up to 14.5 when running. Battery is about a year old. But I did throw a charger on it yesterday just to make sure it wasn't having issues. Also new alternator about the same time as the battery.
  12. R

    2008 Denali XL possible ECM Failure?

    In efi live dvt commands there is a fuel pump duty cycle, but the dvt isn't giving any normal responses. I'll try and mess with it again and see if I can post some screen shots
  13. R

    2008 Denali XL possible ECM Failure?

    I have an autocal, but that is what is making me think that it's the ecm, the data I'm pulling doesn't look normal across the board. I wouldn't write off the cps, but I replaced that about 2 years ago... So I doubt it None of the harnesses or connectors had any corrosion on them, and nothing...
  14. R

    2008 Denali XL possible ECM Failure?

    I did buy it local, but they only had one...
  15. R

    2008 Denali XL possible ECM Failure?

    There was some additional codes initially, the fpcm did have signs that water was in it. Before that it wasn't even powering up the pump.
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