I'm an Ecoboost nerd and do have a well "tuned" Ecoboost in my recent history. So I am just accustomed to monitoring how happy the combustion chamber is as well as if I'm getting what I paid for from the gas station.
I do the exact same thing with the e85. Completely offsets shitty fuel as well.Yep, yaw got it.
The KR pid and Spark Advance pid are very much complimentary to each other. And then the OAR pid basically verifies what the other two are implying.
I originally had the timing advance set to a max range of 32°
You can see that I hastily increased it recently to 40°, but didn't adjust the gauges graphics to match the new range. The reason is that I had been experimenting with adding a few gallons of E85 to my typical 93 octane fillups. It's a 30 gallon tank, so depending on how low it is at fillups, I would add maybe 3-4 gallons of E85, ensuring that I was well below E20, knowing that the factory calibration could easily manage and adjust to the proper fueling.
As a result the truck would often peg the spark gauge at 32°! That's amazing.
Anyways, if you watch the knock-sensors data (KR) it is directly driving/influencing the amount of timing advance that the pcm is commanding. It's all very fluid, of course, and so very much a moving target.
The OAR being at -1 is just confirmation that the timing table in play is the highest advanced table available in Ford's timing table database.
If you were to switch to say... 89 octane, you would see the KR start showing +positive values (between 0-6) and the timing advance would get dialed back. After a few minutes of such a circumstance, the engine management would switch completely to a different timing table (less aggressive) and the OAR value will adjust to something like -.76
Switch to 87 octane and you'll see the ensemble of pids reflect the results similarly.
It's an amazing motor. It'll tell you exactly what's going on.
Exactly.
