How long until OAR registers new fuel mix

[4sfed]

So I mixed a weak tank of fuel which gave me an OAR of -.59. I corrected it and drove about 5 miles....but it still read -.59.

How long does it take for the system to recognize the new mix?

As always, thanks in advance.
S

Sent from my Pixel 4 XL using Tapatalk

 

[luigisho]

https://www.cobbtuning.com/ford-ecoboost-and-the-octane-adjust-ratio-monitor/

Are you on oem tune or did you have a tune installed? Above should give a little info

 

[stripSHO]

It depends on your driving and Matt's settings in the tune. Fastest way to do it that I've found is to do some 4th or 5th gear moderate acceleration pulls from a low dig (not too hard, not too soft, not too much RPM). Watch your knock sensor - you need to get it to at least -3 or -4 and hold it there for a few seconds, then let off. OAR will update then. Lather, rinse, repeat!

These are the stock conditions required for knock learning. They may be different in your tune:

K.R. <= -3 for at least 6.5s
0.40 <= Load <= 1.50
1,200 <= RPM <= 4000
170 <= Coolant Temp <= 230

 

[4sfed]

https://www.cobbtuning.com/ford-ecoboost-and-the-octane-adjust-ratio-monitor/

Are you on oem tune or did you have a tune installed? Above should give a little info

Gearhead

Sent from my Pixel 4 XL using Tapatalk

 

[ridered74]

What he said....as for the gas reaching your fuel rail, when I fill up it usually takes 5-10 minutes of driving before my ethanol sensor settles on a final number, so I would say drive it for about 10 minutes or so and then do the technique stripsho mentions above.

 

[luigisho]

I don't have any reason to doubt either of the other replies. I would also ask Matt if he knows what the parameters are for this car to move between tables based on octane and knock detection.

 

[4sfed]

Ok 100 miles of driving didn't make a difference. Then I remembered something mentioned about watching the knock retard.

So....I put it in 6 and got to just under 50 in sport mode and pushed the gas to about 75%. Only built about 10 or 20 mph, but it went from -.59 to -.61!

That's movement! So...rinse, repeat got it up to....er down to, -.79. One or two more runs like that got it to -.96.

At one point I glanced at the knock retard and saw -4.00! Sa-weet!

Thanks everyone!

Sent from my Pixel 4 XL using Tapatalk

 

[SM105K]

Did that same thing with my Focus today.

 

[mattr66]

2 or more seconds -3 or more negative KR gets you an oar update when running gearhead.

Sent from my Moto Z (2) using Tapatalk

 

[802SHO]

With my a couple gallons 93 pump gas sitting in my tank for 7 months with no Stabil in it...I mixed in 2.5 gallons of 110 octane. First ride and datalog. OAR -96. Quick and easy.