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Thread: Help with base tune?

  1. #1
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    Default Help with base tune?

    Hey guys,
    I'm very new to EFI live tuning but i've been doing tons of research trying to get the base tune for the new setup on my truck. Here are the details:
    05 4.8 silverado
    Deka 80lb injectors
    FPR regulator set at 58psi with boost reference.
    Walbro 450
    3 bar map in stock location
    S475 t4 turbo

    I'm trying to get the basic things done on the COS so it will atleast start and drive so i can do some tuning. I have inputted some of the injector data but i'm confused on a few things. On my xcel spreadsheet it shows "offset" but i have no idea where to paste in this table on EFI live. I am ASSuming it's under table B3701? Also confused where "fuel to wall transient" goes in EFI live. I will attach the spreadsheet and my tune if anyone has time to look them over. Also if anything is way out of wack please tell me. Thanks guys!

    -Ryan
    Denver,CO
    Attached Files Attached Files

  2. #2
    Joe (Moderator) joecar's Avatar
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    Hi Ryan,

    Quote Originally Posted by Burnett03 View Post
    ...
    On my xcel spreadsheet it shows "offset" but i have no idea where to paste in this table on EFI live. I am ASSuming it's under table B3701?
    Yes, that's correct.

    Also confused where "fuel to wall transient" goes in EFI live. I will attach the spreadsheet and my tune if anyone has time to look them over.
    This would be table B3406 "Impact Factor"... but your tune does not have this table (see under Fuel->Dynamics).



    Also do this: set FPR to 58 psi with reference hose temporarily unplugged (i.e. open to atmosphere)

    ( after setting FPR, be sure to reconnect reference hose )
    Last edited by joecar; February 26th, 2018 at 11:43 AM. Reason: fix spelling of Impact

  3. #3
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    As always, thank you for taking the time to help Joe. I'll do that.
    Last edited by Burnett03; February 26th, 2018 at 09:26 AM.

  4. #4
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    Guys I've finally got the truck ready to actually drive. I've started it and it seems to idle fairly well when cold. Once the truck warms up if I turn it off and try to restart it I have to keep my foot on the gas to keep it running. I'm assuming maybe its because the truck needs to relearn the idle? What is my next step tuning wise? I've followed the tutorial in the custom o/s upgrade and deleted the maf. The truck is on a separate IAT sensor and a 3 bar map sensor now. I've also added an AEM wideband and have it logging through efi live via serial. What is my next move? Do I now following the AUTO VE tutorial? I no longer have a MAF sensor, just the 3 bar map, do I still follow this tutorial? Thank you so much guys!

  5. #5
    Joe (Moderator) joecar's Avatar
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    Post tune file and log files.

  6. #6
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    Quote Originally Posted by joecar View Post
    Post tune file and log files.
    Here is my current tune. I will get a log file of idle this weekend once i weld the muffler on. Thank you.
    Attached Files Attached Files

  7. #7
    Joe (Moderator) joecar's Avatar
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    What injectors do you have...?

    Did you measure rail pressure (with reference hose removed)...?

  8. #8
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    Quote Originally Posted by joecar View Post
    What injectors do you have...?

    Did you measure rail pressure (with reference hose removed)...?
    Deka 80lb
    Rail pressure is 58psi with vacuum line removed.

  9. #9
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    Here are two idle logs, plus my tune. i added some airflow to B4307 when hot and it made it idle pretty good hot for a while. Shut it off after 20mins of idle time and i couldn't get it to idle again without babying the throttle with my foot. My second log is when it was a hot restart and didn't want to idle. Thanks
    Attached Files Attached Files
    Last edited by Burnett03; June 3rd, 2018 at 11:16 AM.

  10. #10
    Joe (Moderator) joecar's Avatar
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    You may have to do rafig/idle tuning.

    I'm still looking thru your files.

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