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Thread: E38 idle tuning

  1. #311
    Joe (Moderator) joecar's Avatar
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    I got home late... thanks hymey and LastCall for your replies, I appreciate you help

  2. #312
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    This is a customer's car, right?

  3. #313
    Senior Member auspeed's Avatar
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    With the later OS, the hard limit in the tune for idle has been increased from 60 to 200.
    By hard limit you mean the throttle can be pushed open further for idle via the corresponding parameters?
    Last edited by auspeed; December 5th, 2018 at 03:33 PM.

  4. #314
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    Thanks Hymey and Lastcall for the input.
    Thought I would update.
    I tried your cal Lastcall and the surging got worse. It did pull the timing down nicely. Amazed me as I thought you were onto something.
    So I logged all the EST pids and found that it is Torque Reduction Spark Retard that is pulling the timing however I still don't see what is causing it. I even maxed BTM and Throttle Tip In on the odd chance.
    Kym_5Dec2018_0002.efi
    2006_Z06_12605731_5Dec2018_mod1_0003.ctz
    Kym_5Dec2018_0004.efi

  5. #315
    Joe (Moderator) joecar's Avatar
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    Try setting BTM Limit to min (i.e. most negative).

  6. #316
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    Thanks Joe
    Still surging

    I have spent a ton of time on this. Earlier today I reread this entire thread as well as any other info I could find and thought I had it and was just being a dummy and not remembering some of the steps in this thread. Or so I thought, I am at a loss.
    I finally eliminated the SEMRET by 0ing B2522 Torque Reduction Max. I am a bit concerned this will reduce the traction control any ideas?

    I ended up with redoing the Min Idle Air and Max Idle Air B1651 and B1652. I was thinking I had missed and that if I put B1651 real low like 0.7 or 0.6 it would stop the surging as it wouldn't allow it to go into idle mode. But this seems to also control the idle air max at idle in neutral.
    I have even gone so far as putting it into Open Loop with no short or long terms and setting the MAF to come in at 1000RPM.

    I am at a loss as to where to go from here.
    Any help would be greatly appreciated
    Attached Files Attached Files
    Last edited by TurboCamaro; December 28th, 2018 at 03:15 PM.

  7. #317
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    Hymey and Joe. As I go forward with my SC Corvette, I have tuned the VVE and it runs great. I have also followed Hymey's instructions how to tune the idle and it works. My latest issue is two fold. I cannot find B1703 in the COS for the E-38. The second issue is trying to bring the vve forward and the indicated coefficients. I can copy and paste the vve but when I generate the coefficients and generate the vve it all changes. What are these fixes?
    LBL866

  8. #318
    Joe (Moderator) joecar's Avatar
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    Which V7 build version are you running...?

  9. #319
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    HI Joe
    V7.5.24
    Is there anyway to see/log the idle airflow like commanded air, actual air, Integral, Proportional, etc

  10. #320
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    Quote Originally Posted by joecar View Post
    Which V7 build version are you running...?
    Joe,
    I am using the latest 7.5 that is on the EFI Live Web site. . As for bringing forward the VVE, I figured out what I was doing wrong, so the VVE is now not a problem. GMPX replied with a work around for B1703 so it is fixed at least until you update the software again. If this is not the correct answer to the V7 version then please tell me how to open the Scanneer and fine it. (The Calz file number in tune is is 22614676 and that version is 7.60)
    .
    LBL866

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