2008 Non-Flex Fuel 5.3 Silverado

Burst Knock Retard and Displacement on Demand both Disabled.

Why would the ECM ADD Timing via the ECT Spark Timing Adder function, if the actual ECT is only like 150*, at which that whole area's "adder" function is zeroed out in the tune itself?

Amongst other things, I am logging:
Ignition Timing
Knock Retard
IAT Timing Advance
ECT Timing Advance

Is there another ECT Spark Timing Adder I am not able to see/find?

I am trying to dial in my Timing Advance, and when the ECT ADDED Timing this morning (at 65* ambient/150-ish* Coolant), it caused some Knock Retard.

Over the weekend, it was over 100* and my IAT Advance function subtracted some timing due to high IAT readings (122+*), which is what it is supposed to do, but this morning, there was no reason for the ECT Adder to even be active.

Anyone familiar with this function and why it is active if the ECT is not "hot" or "cold"?

Screenshot, Tune, and this morning's Log, all attached...

 

The answer is yes, most likely. HPT has not made the list of calibratables in the editor comprehensive. So there are many things that you cannot see or change that are operating in the background

 

Well that is not so great....

How do you possibly adjust something you cannot access?

 

You don't, really. However I have been able to dig through the hex and bring some variables into the editor. The trick is you have to know what you are looking for and be able to actually see the expected variable pattern as it appears in the hex code...so it can be a pain in the ***.

Question is, are you experiencing major issues?

 

No. I am just trying to learn more about the new to me Gen IV truck, which is different in a lot of ways, from my old trusty 2002 Silverado.

What I am trying to do right now, is dial in the tune on 87 octane, then run 93 so the whole KR thing will be a memory.

Finally installed the wideband today after work, so I will be dialing in the MAF error and timing, and calling it done.

Thanks for the replies, and I appreciate the insight and help