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Thread: Why won't my AFR % Error histo. work ?

  1. #1
    Tuner in Training
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    Why won't my AFR % Error histo. work ?

    I'm sure something is just not right in my config, I thought I had all the right PIDs added.... I've attached a copy of my config and a recent log.

    Sorry if its a simple solution but I can't seem to figure it out

    I'm logging my wideband through the EGR by the way. Wideband readings seem to work fine and be pretty accurate.

  2. #2
    Senior Tuner 5_Liter_Eater's Avatar
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    There is a bug that prevents user defined custom pids defined as air fuel ratio sensors from being used in the built in AFR Error PID. You need to create your own user defined PID for AFR Error. It's weird because the built in PID for AFR works when you define the user PID as an AFR sensor, but the built in AFR error PID is hardcoded somewhere to only look at Pro inputs when it does it's calculation.

    http://www.hptuners.com/forum/showthread.php?t=10870
    Bill Winters

    Former owner/builder/tuner of the FarmVette
    Out of the LSx tuning game

  3. #3
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    I thought thats what I did.... did you look at my config?

  4. #4
    Senior Tuner 5_Liter_Eater's Avatar
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    Config files do not contain user defined PIDs. I need screenshots of them.
    Bill Winters

    Former owner/builder/tuner of the FarmVette
    Out of the LSx tuning game

  5. #5
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    Sorry I didn't know that. I figured it out though. I had two issues. I was using just AFR Commanded instead of AFR Commanded hi-res and I was using EGR Voltage with the equation i was using in my wideband PID (which probably would have worked) but i just used the user defined PID instead of EGR Position in volts / whatever.

  6. #6
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    i am also having this problem. i cant see histo 5 and 7. can someone post their custom PIDs so i can copy them to see AFR %error and also, i cant see my MAF (Hz) either... weird. it is in my table display!

    i am using an LC1 thru the EGR with a PID of "([PID.2811]/.625)+10".

  7. #7
    Senior Tuner 5_Liter_Eater's Avatar
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    do you have EGR position (V) in your table? When you say you can't see them are you getting the 'unsupported parameters' message?
    Bill Winters

    Former owner/builder/tuner of the FarmVette
    Out of the LSx tuning game

  8. #8
    Senior Tuner 5_Liter_Eater's Avatar
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    Here is my user PID for AFR Error:

    100*([SENS.120]-[SENS.121])/[SENS.121]

    Theoretically it's the exact same as the built in AFR error PID but that one does not seem to grab user defined AFR sensors.
    Bill Winters

    Former owner/builder/tuner of the FarmVette
    Out of the LSx tuning game

  9. #9
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    yes i have EGR position in the table, and thats what my regular AFR error looks like, but i guess ill try adding another custom one that looks identical??

  10. #10
    Senior Tuner 5_Liter_Eater's Avatar
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    I know it doesn't make sense but yes. Then change your histograms to use this user defined PID for AFR Error.
    Bill Winters

    Former owner/builder/tuner of the FarmVette
    Out of the LSx tuning game

  11. #11
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    works now!! thanks!
    Last edited by dmw319; 07-04-2007 at 06:33 PM.

  12. #12
    Senior Tuner 5_Liter_Eater's Avatar
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    Beauty. It's a weird bug. Hopefully it gets fixed in 2.1.20 so it's easier for us cheaters to share logs.
    Bill Winters

    Former owner/builder/tuner of the FarmVette
    Out of the LSx tuning game