Sponsored

Octane Adjust stuck at 0

ice445

Well-Known Member
Joined
Apr 13, 2020
Threads
33
Messages
6,091
Reaction score
7,222
Location
Salt Lake City, UT
First Name
Ryan
Vehicle(s)
2020 Mustang GT 6MT
I noticed this while logging today, OAR (learned octane adjustment) never actually learns anything, it just stays at 0... That means the car isn't subtracting any timing, but it isn't adding any either. Has anyone ever seen this before with the stock tune? I'm going to try resetting the adaptive tables manually with my scan tool and see if it fixes it, but that's very bizarre. I always use 91, but even if I didn't, there's basically no way this value could stay at 0.0 unless it just isn't turned on or bugged out for some reason.
Sponsored

 

FruityJudy

Well-Known Member
Joined
Nov 13, 2018
Threads
15
Messages
887
Reaction score
766
Location
South Alabama
Vehicle(s)
2018 Mustang GT A10
What tool are you using? I dont believe the cars learn any octane factory. The knock sensors take care of any timing adjustments needed
 

WildHorse

N/A or GO HOME
Joined
Jun 28, 2017
Threads
216
Messages
8,462
Reaction score
6,533
Location
Home World: CLASSIFIED
First Name
ⓇⒾⒸⓀⓎ ⓈⓅⒶⓃⒾⓈⒽ
Vehicle(s)
'17 S550
Vehicle Showcase
1
OP
OP
ice445

ice445

Well-Known Member
Joined
Apr 13, 2020
Threads
33
Messages
6,091
Reaction score
7,222
Location
Salt Lake City, UT
First Name
Ryan
Vehicle(s)
2020 Mustang GT 6MT
What tool are you using? I dont believe the cars learn any octane factory. The knock sensors take care of any timing adjustments needed
Forscan with my OBDlink MX+. OAR or "learned octane adjust" is basically inferred from knock sensor performance and the car decides fuel quality from it. -1 is the best value and 1 is the worst. Since I'm not getting spread in either direction I'm basically not getting the best performance the stock tune can offer
 

The Demon

Well-Known Member
Joined
Mar 3, 2021
Threads
126
Messages
2,556
Reaction score
4,145
Location
CA
First Name
Brett
Vehicle(s)
2022 Mach 1 N5809, 2019 Mustang GT Premium PP1
Vehicle Showcase
1
I’m assuming you’re tuned Ryan? I haven’t checked, but I don’t know if there’s a setting to check this on the nGauge. My car runs fantastic, but I’d like to know if the car is doing what it supposed to based on octane.
 

Sponsored

WildHorse

N/A or GO HOME
Joined
Jun 28, 2017
Threads
216
Messages
8,462
Reaction score
6,533
Location
Home World: CLASSIFIED
First Name
ⓇⒾⒸⓀⓎ ⓈⓅⒶⓃⒾⓈⒽ
Vehicle(s)
'17 S550
Vehicle Showcase
1
Forscan with my OBDlink MX+. OAR or "learned octane adjust" is basically inferred from knock sensor performance and the car decides fuel quality from it. -1 is the best value and 1 is the worst. Since I'm not getting spread in either direction I'm basically not getting the best performance the stock tune can offer
Are the KS adding/subtracting timing ?
 
OP
OP
ice445

ice445

Well-Known Member
Joined
Apr 13, 2020
Threads
33
Messages
6,091
Reaction score
7,222
Location
Salt Lake City, UT
First Name
Ryan
Vehicle(s)
2020 Mustang GT 6MT
I’m assuming you’re tuned Ryan? I haven’t checked, but I don’t know if there’s a setting to check this on the nGauge. My car runs fantastic, but I’d like to know if the car is doing what it supposed to based on octane.
Nope, unfortunately I'm on the stock tune which makes this more strange. I do wonder if the ngauge can log this. I think there's another similar value called "KOM" or knock octane modifier and its the same thing but works on the opposite scale (so 1 would be the best value).
Are the KS adding/subtracting timing ?
Doesn't seem to be, no. I'm not really getting any actual knock counts, but the sensors do appear to be working. It's usually sitting around 20 on both sensors for absolute values.

Gonna reset the learned memory and fill up with a fresh tank of 91 and cross my fingers I guess, because this is pretty odd.
 
OP
OP
ice445

ice445

Well-Known Member
Joined
Apr 13, 2020
Threads
33
Messages
6,091
Reaction score
7,222
Location
Salt Lake City, UT
First Name
Ryan
Vehicle(s)
2020 Mustang GT 6MT
Well resetting adaptations has already fixed something that was concerning me, the car would always charge at like 15v despite SoC being 90%+. Now it's scaling down as expected.

I wonder if something got glitched out when I was installing my battery charger pigtails. Time will tell, but I have to do some driving to see if OAR comes back online and knock adjust starts doing something.
 

Cobra Jet

Well-Known Member
Joined
Feb 12, 2015
Threads
705
Messages
16,230
Reaction score
17,942
Location
NJ
Vehicle(s)
2018 EB Prem. w/PP and 94 Mustang Cobra
Well resetting adaptations has already fixed something that was concerning me, the car would always charge at like 15v despite SoC being 90%+. Now it's scaling down as expected.

I wonder if something got glitched out when I was installing my battery charger pigtails. Time will tell, but I have to do some driving to see if OAR comes back online and knock adjust starts doing something.
I don’t know if this matters, however have you read through the threads on here regarding having to reset the battery management system when swapping batteries or replacing a battery? I know you state you were just adding pigtails for your battery charger, but I’m wondering if somehow that has affected your BMS, which would affect PCM strategies.

See these threads (if you haven’t):
https://www.mustang6g.com/forums/threads/bms-reset-no-tools-required.151602/

https://www.mustang6g.com/forums/threads/battery-management-system-reset.106897/
 

Sponsored
OP
OP
ice445

ice445

Well-Known Member
Joined
Apr 13, 2020
Threads
33
Messages
6,091
Reaction score
7,222
Location
Salt Lake City, UT
First Name
Ryan
Vehicle(s)
2020 Mustang GT 6MT
I don’t know if this matters, however have you read through the threads on here regarding having to reset the battery management system when swapping batteries or replacing a battery? I know you state you were just adding pigtails for your battery charger, but I’m wondering if somehow that has affected your BMS, which would affect PCM strategies.

See these threads (if you haven’t):
https://www.mustang6g.com/forums/threads/bms-reset-no-tools-required.151602/

https://www.mustang6g.com/forums/threads/battery-management-system-reset.106897/
I did take the battery out of the car yes, but I didn't do another reset because I didn't want to reset the days in service value. Resetting all the adaptations seems to include resetting the BMS in some capacity though, since my charging strategy changed.

I didn't get to drive the car today, so I'll find out Tuesday if its working again
 

K4fxd

Well-Known Member
Joined
Apr 2, 2020
Threads
102
Messages
10,360
Reaction score
8,495
Location
NKY
First Name
Dan
Vehicle(s)
2017 gt, 2002 FXDWG, 2008 C6,
What is your total timing?
 

JJSSI

Well-Known Member
Joined
Dec 10, 2019
Threads
5
Messages
159
Reaction score
78
Location
St Simons Island, Georgia
First Name
Jim
Vehicle(s)
2020 EcoBoost HPP w/Handling Package, 2004 Boxster S, 2013 Jeep JK,
Vehicle Showcase
2
I did a KAM reset to fix mine. This needs to be done with a tool, not a battery disconnect. I used an Autophix 7150. There should be several devices that will do this.
 
OP
OP
ice445

ice445

Well-Known Member
Joined
Apr 13, 2020
Threads
33
Messages
6,091
Reaction score
7,222
Location
Salt Lake City, UT
First Name
Ryan
Vehicle(s)
2020 Mustang GT 6MT
What is your total timing?
In what situation?
I did a KAM reset to fix mine. This needs to be done with a tool, not a battery disconnect. I used an Autophix 7150. There should be several devices that will do this.
Gotcha, I used forscan lite to do it so hopefully that works.
 

K4fxd

Well-Known Member
Joined
Apr 2, 2020
Threads
102
Messages
10,360
Reaction score
8,495
Location
NKY
First Name
Dan
Vehicle(s)
2017 gt, 2002 FXDWG, 2008 C6,
 




Top