2013 Escalade Hybrid - AFM disabling recommended?

[Marky Dissod]

Stopped believing in Engine Half@$$ altogether in 2017 *except possibly as an overheat mitigation measure*.
SUVs & pickup trucks simply have too much aero drag to meaningfully improve MpGs.
Should've taken the money Engine Half@$$ would've 'saved', replaced 3.08 with 3.73, and disabled Engine Half@$$ (*).
6L80 would've appreciated both of those favors as well.

I'd really like to get it tuned, but right now my bank account says get the Chinesium dongle.

Plenty of regrets go unnoticed until AFTER the fact ...
"... and there's NOTHING WORSE than 'too late.'" - Charles Bukowski

I bet if you look hard enough, there's SOMEONE within 100 miles of you that'll have HPT;
disable Engine Half@$$ (*?), give your ecm/tcm a wet tickle of a howd'ydoo,
enough to make the engine AND 6L80E last longer.

 

[j91z28d1]

I've seen posts on Facebook market for afm turned off with hpt. it's 2 credits to unlock the ecm, and then one drop down box to change save and upload. credits used to be 50$ each and then whatever they want for the 15mins of time.

 

[OBSalsoNNBS]

I was (and very occasionally still am) a taxi / livery driver / chauffeur for hire in NYC.
.....

@Marky Dissod
That's a neat story, with a few lessons. So the V4 saved you during the overheat, maybe it knew something and felt bad? Lol.
Do you attribute the oil consumption to V4?

 

[Marky Dissod]

So the V4 saved you during the overheat, maybe it knew something and felt bad?

It didn't quite SAVE me, but it bought me precious time.
The part-time V4 helped to dissipate some of the full-time V4's heat.

Do you attribute the oil consumption to V4?

Absolutely. Say the AVERAGE operating coolant temp is anywhere between 194F & 212F (my experience as viewed with a scantool).
In V8 mode, each cylinder is at the same temp, with negligible variation.

(One reason why the firing order was changed from 8-4-3-6-5,7-2-1 to 8-7-2-6-5-4-3,1 was to reduce thermal variances between the cylinders.
It was one of several things GM did to make each cylinder both statically and dynamically as identical as feasibly possible.)

During Engine Half@$$, the part-time V4 cools off a bit compared to the full-time V4.
When the engine becomes a V8 again, the full-time V8 stays at operating temp, the part-time V4 warms up.
Then the Engine Half@$$es again, and the part-time V4 cools off a bit ...
Then the Engine becomes a V8 again ... then a Half@$$ again ... then a V8 again ... then a Half@$$ again ...
til the part-time V4 starts wearing at a different rate (FASTER) compared to the full-time V4.

I never got a chance to stick a borescope into the sparkplug holes,
but the part-time V4's rings were most likely coked up, not wiping motor oil off the cylinder bores,
effectively letting some motor oil sneak into the combustion chamber to get burned.

Should've disabled V4 mode IMMEDIATELY.

 

[OBSalsoNNBS]

It didn't quite SAVE me, but it bought me precious time.
The part-time V4 helped to dissipate some of the full-time V4's heat.

Absolutely. Say the AVERAGE operating coolant temp is anywhere between 194F & 212F (my experience as viewed with a scantool).
In V8 mode, each cylinder is at the same temp, with negligible variation.

(One reason why the firing order was changed from 8-4-3-6-5,7-2-1 to 8-7-2-6-5-4-3,1 was to reduce thermal variances between the cylinders.
It was one of several things GM did to make each cylinder both statically and dynamically as identical as feasibly possible.)

During Engine Half@$$, the part-time V4 cools off a bit compared to the full-time V4.
When the engine becomes a V8 again, the full-time V8 stays at operating temp, the part-time V4 warms up.
Then the Engine Half@$$es again, and the part-time V4 cools off a bit ...
Then the Engine becomes a V8 again ... then a Half@$$ again ... then a V8 again ... then a Half@$$ again ...
til the part-time V4 starts wearing at a different rate (FASTER) compared to the full-time V4.

I never got a chance to stick a borescope into the sparkplug holes,
but the part-time V4's rings were most likely coked up, not wiping motor oil off the cylinder bores,
effectively letting some motor oil sneak into the combustion chamber to get burned.

Should've disabled V4 mode IMMEDIATELY.

Ah, of course! That makes sense to me. Thank you for enlightening me.