Anyone have experience or link to resetting Zero Fuel Calibration and Fuel Mass Observer?

[Pescatoral Pursuit]

They are both learning algorithms.

GDE is telling me it's a source of detuning.
And with the shorter tires on while I experiment with effective gear ratios, the truck is acting really funny: it now feels considerably more depowered and is shifting at 200-300 higher rpms. (Yes I recalibrated the tire size.)

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[Rusty PW]

You could try and remove both battery grounds. Step on the brake pedal and hook the grounds back up. Stepping on the brake pedal kills any electric juice left in the system.

 

[BlueScapegoat]

They are both learning algorithms.

GDE is telling me it's a source of detuning.
And with the shorter tires on while I experiment with effective gear ratios, the truck is acting really funny: it now feels considerably more depowered and is shifting at 200-300 higher rpms. (Yes I recalibrated the tire size.)

Was GDE not able to provide this information? Kind of a bad look.

And is this something that continuously needs resetting? Cause that makes the tune way less appealing. I just want something that works, all the time.

 

[Pescatoral Pursuit]

Was GDE not able to provide this information? Kind of a bad look.

No. Told me I needed a scanner and an app. Wouldn't recommend either.

And is this something that continuously needs resetting? Cause that makes the tune way less appealing. I just want something that works, all the time.

This seems to have more to do with the structure of the PCM, than the tune, though I wonder if tuners could not tune out this portion?

If you drive like a banshee all the time you probably don't have to worry about resetting the learning parameters. But I drive like granny all the time except for when I really want it to go, but then I really want it to go.

 

[BlueScapegoat]

No. Told me I needed a scanner and an app. Wouldn't recommend either.


This seems to have more to do with the structure of the PCM, than the tune, though I wonder if tuners could not tune out this portion?

If you drive like a banshee all the time you probably don't have to worry about resetting the learning parameters. But I drive like granny all the time except for when I really want it to go, but then I really want it to go.

That does make sense that they'd be tight lipped I suppose, the EPA is crazy strict now. May be as simple as plugging in a OBDII reader in clearing some stuff, something like JScan might do it.

I haven't got the GDE tune yet, I was planning on it this month but I think I'm going to spend the money on other parts with appreciable Black Friday sales.

But once I have an unlocked PCM I'm interested to dig around in it myself. I've done just a bit of work with HPtuners and my Ram SRT10 and setting up my 05 TJ with a supercharger but they're both NGC PCMs, I have no idea what the new stuff is like.

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