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Thanks very much for the feedback! I figured it wouldn't be a substantial savings by changing the AFR but I was hoping for a few percent savings at least. Perhaps that may be a bit optimistic of me....

I am logging Fuel Trim Cell actually and it never seems to match up to anything that I have seen. It has only ever been 0,8,14,or 15 with the majority of my driving being 0 and most of the rest being...

Bingo... that is exactly what I was thinking I could do. I have read all over the place not to do that, but there was never a clear explanation as to why. You clearly explained what is happening and...

Vehicle is 2017 Silverado 1500 5.3L-L83 6L80E.
Long story short here, looking for things in my tune that can be done to improve fuel economy some given the recent gas prices. I thought the O2 sensor...

What do you mean by disabling the LTFTs on the scanner side when logging? I don't quite follow. How can it be in your calcs if it is disabled?

I'm kind of asking for several reasons. General curiosity and checks/validation are the primary reasons. I did use the sum of the ST and LTFT with a bunch of filters for steady state data and 150...

Thanks for the replies blindsquirrel and Matt! Okay, so it sounds like its a relatively short term average on the order of possibly hours instead of weeks or thousands of miles. I knew it is a moving...

I am wondering what length of time or how far would you typically recommend to drive for LTFTs to become steady and change very little? How long are LTFT averages stored? I know they can be reset by...

Thanks for the insight Haans249. And especially thanks for the filters advice. I wouldn't have figured that out.

I didn't exactly follow your advice though, I left the LTFTs enabled and added...

Story of my life lol. I know just enough to mess with stuff, but don't really know what to do with it.

Thanks a ton for the insight and advice! I played with the Torque adder table and the Inertia...

@hjtrbo, it seems you know quite a bit, if you have time could you take a look at this log and help explain what I am seeing?

In the log, it looks like the gear change is initiated very near...

Thanks so much for your input hjtrbo! I love how well and simple you explained all of that. Very easy to follow and understand. Thanks for the video links too!

I guess I was just confused there...

That makes sense to me in a way and in another way it doesn't at all. I would think to use the LTFT because it should be a good average over a long time of what is happening. But I could see using...

Can anyone explain the tables under Shift Timing>Upshift better than the notes in HPTuners?

1) Initial Transition Time Tables-Percent of desired shift time to transition from initial turbine...

So it's been a couple months now since I've changed anything in the tune and have done a ton of driving so the LTFTs should be well settled, I assume. The LTFT trims vary from -2.0 to -13.7, with the...

I am working on a 2017 Silverado 1500 LTZ 5.3L-L83 6L80E. Tried pulling up the "Controls and Special Functions" window and adjusting the camshaft angles while driving. This engine only has one...

There is nothing aftermarket that i am aware of. I bought the truck with 60k on it and i have not done anything to it.

Would you mind sharing how to set up the custom PID for the humidity...

And another peculiar thing i cant seem to catch in a log, i have noticed most days my 25 mile average gas mileage will be around 19.5 and power seems good, and then randomly there will be like two...

Looking at every channel I can log related to timing, the base advance is saying 4.6 which looks to line up perfectly with the high octane base table. But Timing Advance (SAE) is reading 1.5deg with...

I am a bit confused by these graphs... I thought advancing the cam increases intake vacuum and retarding lowers vacuum. It looks like the intake vacuum is actually decreasing with the advancing cam....

That is exactly what I thought... now I don't feel so crazy.

I have not changed anything on the engine yet. The only thing I have done so far is the TCC settings and shift timing. I am starting...

So I actually was able to clean the MAF sensor like I planned Saturday. Reset the LTFTs and drove about 150miles so far. I'm seeing better percentages, but still seeing -6 to -10 on the LTFT values....

I haven't had a chance to clean the MAF sensor yet, planning that for Saturday. But I got to thinking, my truck doesn't have the flex fuel sensor so its locked in thinking the fuel is 10% ethanol. I...

Thanks blindsquirrel.

Here's the logs...

115593
115592
115591

Does anyone have any thoughts on this? Or tips on how to upload log files. I assume 10.1MB is too large since most other logs I see on here are under 1MB. Any way to clip the log to make it smaller?