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GMVE is not a log-able parameter. It is a made term/idea/concept. You need to create your own custom math parameter and then chose a name...which people universally call "GMVE".

Of late the whole...

If there was free one stop shopping to learn everything about tuning, all the pay to learn tuning schools out there would be out of business.

So you have three paths:
1) try to get all the free...

Just post them here.

The correct way is going to involve a dyno and lab grade emissions testing equipment IMHO.

There several different ideologies and methods. It is something I have spent considerable time on and put...

Can you elaborate on this please? Are you saying for any Gen4 ECM (N/A or Supercharged) to leave all OEM values alone? What kind of bug do you see? Is it the fuel spike like when you fail the MAF?

This is most likely being caused by not logging a PID that is referenced in the filter. You can add or remove each element of the filter and watch when the chart changes....or you can watch this...

So perhaps Allen you can try setting this table back to stock as a test
[ECM] 33030

Seems like a good way to test this would be to poke around on the fuel tab and tweak the Low/Med/High flow definitions and possibly the Fuel Pressure Transition Rate values.

Also, has anyone...

Hilarious LMAO
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I too have a '14 Chevy SS (Holden). Passenger side (B2) is always about 5% richer. It has done this with different sets of heads, intake manifolds, fuel injectors, replaced O2 sensors/swapped them...

Has anyone logged the EVAP commanded duty cycle to compare against these lean spots yet?

After looking at the log I don't see anything that really jumps out. You can do a quick and dirty experiment and decrease the Proportional and increase the Integral to see what happens. What you need...

Sorry I missed the first page! I will take a look in a few minutes.

Correct, failing the MAF does not impact the IAT.

Going into SD has it's own pitfalls though. You will need to either apply...

You do not need a breakout harness to go into SD. Just tune your PI controller for your fuel swings...or at least post a log with a wideband so we can look to verify.

The break out would be if you...

This should help...but she is looking really lean. You will need to add fuel.

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Here is something to try out.
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That would be great to see the results!

Edit: if you can specifically test to see how and when the Make Up Mode fires, that would be most excellent!

I forgot, there is one other nice indicator of proper EOIT. CLEAN cylinder head intake runners, intake manifold runners, intake manifold plenum, and throttle body. Once I got SOI/EOI sorted out there...

In general, no one is going to agree on the correct or best way to handle SOI/EOI. The OEMs are going to focus on Emissions, Drivability, and Power (in that order). And as for aftermarket tuners,...

You cannot log any PIDs related to SOI or EOI in the scanner for a Gen4. This is why I made the EOIT calculator tool. You notice the names of those channels all reference "DI" as in Direct Injection....

Are you referring to the rich/lean swings you are seeing on your wideband? If so, this is very typical after adding an aftermarket cam, and you need to tune the PI controller. Here is how to do it:...

Yes most people max this table out to 100 (I also have a 14 SS sedan). Just don't change the Desired Throttle Area Map tables in the same tab.

The limp mode should be "fixed" in the "3.6.24 - 3BAR MAP Tune 2.hpt" tune you posted since the airflow correlation enable RPM ([ECM] 4042) has been effectively disabled by raising it to 8,000 rpms.

It is all good. I am interested in the solution to this as well. I still want to try to work on the EOIT angle if you are still willing. I am not sold on the reversion idea. Have you considered it is...

Oh wait are you talking about the LSA Lean Spot or the original topic for this thread (intermittent stumble)?

As for the intermittent stumble, it happens no matter what.

I believe SGod1100...