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  1. Replies
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    Do you have a log? Were you getting knock? That...

    Do you have a log? Were you getting knock? That may be why your timing was set a little low.
  2. Here's my latest scan. Check out the values and...

    Here's my latest scan. Check out the values and the counts. It looks like I have plenty of counts and the values don't look too bad. It seems to confirm the spike at 1800 rpm.

    I do have a filter...
  3. I'm logging n>10 but most of my cells are >25....

    I'm logging n>10 but most of my cells are >25. I'm just curious if people have seen high spots like I'm seeing at 1800 rpm and 2600 rpm. I'm only focusing on the <4000rpm points and around WOT, so...
  4. VVE Tuning. Histogram looks good but the surface plot looks ugly

    Hi All,

    Doing some VVE tuning and the data looks pretty in line, but the surface plot is pretty rough. I've attached a photo of the histogram, the the surface plot, the log and tune.
  5. Thank you for the feedback and all the good...

    Thank you for the feedback and all the good points you've listed which I will take into account as I move further into the tune. I'll shoot you a PM with some more questions.

    Right now my main...
  6. Thank you for the reply. I have not tuned the VVE...

    Thank you for the reply. I have not tuned the VVE yet. So far I'm just working on the MAF tune in open loop. I am ready to start open loop VVE tuning, but I was hoping to resolve the lean issue I'm...
  7. Thank you for the reply. Per your suggestion I...

    Thank you for the reply. Per your suggestion I set the open loop gains back to stock and got the same results. The attached log shows pretty clearly large lean error on startup, then after a ride...
  8. 07 LS7...car runs very lean during startup in open loop

    Hi all,

    I'm attempting to tune my 07 LS7 MAF in open loop. On startup, the car runs very lean for about 10-15 minutes, then the EQ error falls back in line. Looking for suggestions on what might...
  9. Replies
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    4,611

    Thanks for the feedback. I have my injector temp...

    Thanks for the feedback. I have my injector temp gain table set to zero. Are there other tables that I should investigate?
  10. Replies
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    Well I threw in the towel for a bit but I decided...

    Well I threw in the towel for a bit but I decided to take the car out for a drive today without changing the tune. The MAF error % values look much better than log 7.

    I'm pretty confused, why...
  11. Replies
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    4,611

    Thanks for the feedback. I'm actually running...

    Thanks for the feedback. I'm actually running stock injectors. I thought open loop would be the easiest because I wouldn't have to worry about filtering out PE data. I thought log 5 was great also,...
  12. Replies
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    I disabled fuel trims in the tune but I've...

    I disabled fuel trims in the tune but I've attached the tune for review.

    Tune 5 corresponds to the changes I made based on the error of log 5.

    Tune 6 corresponds to the changes I made based...
  13. Replies
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    4,611

    I did, just out of habit, but does it matter...

    I did, just out of habit, but does it matter since I've only been logging in open loop?
  14. Replies
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    4,611

    MAF tuning - error % keeps getting worse

    Hi all,

    I did 3 logs yesterday using OL and my wideband to record MAF % error and I thought I was on the right track but on my last log, my errors just shot up and I can't seem to get/keep the...
  15. Replies
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    1,364

    Thank you, any comments on the log and tune? Does...

    Thank you, any comments on the log and tune? Does the tune, log, and filters look ok?

    Next I'll do the same thing but with VE. I noticed people recommending moving the high octane tables to the...
  16. Replies
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    1,364

    Thank you for the feedback. Why do you prefer...

    Thank you for the feedback. Why do you prefer closed loop over open loop and the wideband? The wideband seems easier since you can capture PE and non PE in one shot and get much more data, but I'm...
  17. Replies
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    MAF tuning log/file looking ok?

    Hi all,

    Could I get a second set of eyes on my log file and tune? I'm currently attempting MAF tuning in open loop. The posted tune is after I applied the MAF error that was shown in the log.
    ...
  18. Replies
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    Wideband ground question

    Hi all,

    I keep hearing about the importance of wiring the wideband controller ground to an engine/chasis ground. it will add more complication to my setup because I'm pulling voltage from inside...
  19. Replies
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    Some newbie questions

    Hi all,

    Some newbie questions to run by you:

    Car is a Z06 with cam/headers/intake/cold air. I understand the general concept of setting up a startup tune, then tuning the maf tables, then the...
  20. Replies
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    2007 Z stock tune attached.

    2007 Z stock tune attached.
  21. Have you considered remote tuning? There are many...

    Have you considered remote tuning? There are many tuners that will remote tune your car if you send them logs with a wideband.
  22. Thank you! That makes sense. I'll remove the...

    Thank you! That makes sense. I'll remove the Intake Air Temp 2 channel.
  23. Live View IAT sensor readings do not match log

    Hi All,

    Car is a 2007 LS7. See below for a video of the live view and the corresponding log. The log looks correct but the live view gauge does not seem to read properly.
    ...
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    You have to set the DTC to MIL on first error

    You have to set the DTC to MIL on first error
  25. Replies
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    MAF tuning question...

    I have tuned some of the VE table until 4,000 rpm and would like to now attempt MAF tuning.

    I've read many topics on this but I haven't seen many people set the RPM VE table disable to 0 instead...
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