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Help with tune, I am very close!!

Old Sep 25, 2014 | 01:09 PM
  #11  
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OK, so I will look at the desired airflow again. Even though my VE was pretty close according to the last log, do you think that it could need dialing in more?
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Old Sep 25, 2014 | 01:14 PM
  #12  
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I have a gauge for that
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Nope, if trims are below +/- 10 your fueling is probably fine.
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Old Sep 25, 2014 | 01:29 PM
  #13  
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Originally Posted by Atomic
Thats really low for cruise but fine for idle. Your problem is not too much timing, its too much air.
Originally Posted by Atomic
Nope, if trims are below +/- 10 your fueling is probably fine.
This... You have the truck adding too much air somewhere. From what you have stated, fuel is pretty well dialed in. Leave the VE table alone now and figure out where the extra air is coming from.

What do your STIT (short term idle trims) look like. They will tell you how far off your base running airflow table is.
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Old Sep 25, 2014 | 01:38 PM
  #14  
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Well, there are spots where the LTFTs will get to -12. The STFTs never go above or below 10 though. It is the constant fluxing of them though. Since you can't look at the log at work, here is a pic of what I am talking about.

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Old Sep 25, 2014 | 01:49 PM
  #15  
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I have a gauge for that
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Cant see the pic either

You need to add STFT and LTFT together, and actually I turn off LTFTs for my purposes. They should constantly oscilate around 0, that is normal. You want the sum of LTFT + STFT to be 0. If you keep LTFTs enabled, remember to clear them every time you flash a new tune.
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Old Sep 25, 2014 | 02:10 PM
  #16  
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PM me your email address if you are OK with that and I will email you the pic. It just seems like the STFT swing too much. I understand you want them to be close to 0 but I wouldn't think they should swing as much as I am seeing.

Last edited by Will; Sep 25, 2014 at 02:25 PM.
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Old Sep 25, 2014 | 08:50 PM
  #17  
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Well, I think I made some really good progress!

The stalling is completely gone. The surging is very, very minimal, but if I really look for it, I can tell it is still kinda there.

The cruise control feeling is also almost gone, but I think I found an issue that kind of contributed to that feeling as it is still pretty much there in the 10MPH-20MPH range.

I think it has to do with the torque converter. Maybe you guys can shed some light on it for me. The two logs are when I ran it after doing the desired airflow tuning and the other is just transmission PIDs to determine if there is some transmission tuning that needs to be done. One weird thing about the log is that the TCC mode kept going AppEn several times, but never engaged, it is good it didn't engage, but is that mode normal?

I also included the new tun file with the updated desired airflow.
Attached Files
File Type: efi
Log_Drive.efi (236.8 KB, 72 views)
File Type: efi
Log_Tranny.efi (117.6 KB, 52 views)
File Type: zip
Sleeperado v1.0.zip (435.8 KB, 3 views)
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Old Sep 26, 2014 | 09:17 PM
  #18  
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Atomic? Any suggestions?
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