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The tune file is all stock (or close enough, I did not check the OS ID on the file I used for compare so the minor diff's could just be that), this is not a tune issue.

If you increase octane AND...

...and that file is nowhere near ready to begin any kind of tuning yet. Literally the only changes to the whole entire DTC list are for P0101-103, just for starters. EGR spark not zeroed (though EGR...

Actually, since the Offset data will be for "0 kPa VAC at 58 PSI", you should instead use the 300 kPa Delta column from one of the E38/E67-format tables. You will have to paste the ones that match...

You can't half-ass the important things in the factory PCM like you can with a Holley, if you want the driveability you're looking for. Important things like injector data (your flow rate table is...

Tuning the closed loop/non-PE parts with the NBs/trims and saving the WB for the open loop parts gives much better results. The NBs/trims will also tattle on the WB, and unless you have a second WB...

If you mean you disconnected the feed line from the rail (and therefore the regulator), and put the gauge in the end of the feed line, and ran the pump deadheaded against the gauge, that does not...

This is like all the Greatest Hits all rolled into one...

Having issues, but no mention of what the fuel pressure is, or that it's even been verified. MAF DTCs set to No MIL instead of MIL on...

If it's for the spark table, somebody please tell me how it's possible to be above 1.20g/s at anything other than WOT? And then, what benefit there is to having different spark timing at 1.50 or...

Nope, raising idle speed & adding timing increases vacuum - but only up to a point. Beyond some point opening the throttle more will not increase vacuum (numerically lower MAP reading), and adding...

Higher MAP, less vacuum, closer to normal atmo... that's not less pressure. Less negative pressure as referenced to baro, maybe.

'Virtual' flexfuel without the sensor does not work very well even in completely stock unmodified brand-new vehicles. Not recommended.

You can log/graph both fuel trims and wideband at the same time (in separate graphs, of course), without disabling anything in the tune, and use filters to clean up unwanted stuff. Only graph trims...

Use fuel trims to tune the closed loop regions, using data from the actual narrowbands that will be controlling it after you are 'done' (whatever 'done' means, to us weirdos who never stop tinkering...

That is... suboptimal. Yes, I know that's the way all the youtoob celebs tell you to do it. They are wrong.

I understand how scaling works so let me say some things and ask some questions that give all the indications that I do not understand how scaling works.

P01/P59 have an injector flow rate limit...

Why? Is it a race car, like the kind that gets trailered somewhere, the tune adjusted to that day's specific weather conditions, then run and put back on the trailer to go home?

'Vehicle Controls & Special Functions' button, up on the toolbar.

Aww, does somebody need a cuddle and/or a nap? Here, I will loan you an emotional support monster. She's not as ferocious and scary as she likes to think.

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If you are logging the things...

But, I had an '80 Malibu with the old pellet-bed converter on it and that one picked up big time when I cut it off, therefore, I cut the cats off everything I own to this very day. There are some...

So start a new thread with this new, unrelated problem, and attach your tune file in the ECM when the problem happens, and a log file showing it happen, like you have to do with anything like this...

Posting the tune file would be a good start, I guess.

Why is it so lean? What's the fuel pressure?

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