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Old 01-12-2021, 11:16 PM   #1
maverpl
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Default High AF Correction?

Hey guys, quick question. Is AF correction 1 -20 to +35 normal? AF Learnin 1 -15% to +18. I have seen it pooped out couple times on my AP when driving to work, occasional -1.41,-2.81 knock. I feel like the car jerks a little when driving in traffic, AFR looks fine, no DAM drops. I have been dyno tuned since couple weeks.

GS EBCS, CHARGEPIPE, TMIC, INTAKE, JPIPE
Perrin turbo inlet, IAG TGV deletes, P&L EGR delete.

93octane.


Are those AF correction and learing numbers fine? Should i be concerned about this?
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Old 01-13-2021, 12:34 AM   #2
dpetro1
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Are you quoting min/max values or are you getting those values while cruising? Under load?
Take a datalog to post up so we can take a look at what is going on.
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Old 01-13-2021, 01:34 AM   #3
maverpl
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Quote:
Originally Posted by dpetro1 View Post
Are you quoting min/max values or are you getting those values while cruising? Under load?
Take a datalog to post up so we can take a look at what is going on.


Theses are the min and max values i saw when cruising not sure when they happend. Will get a log tomorrow.
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Old 01-13-2021, 01:39 AM   #4
dpetro1
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Quote:
Originally Posted by maverpl View Post
Theses are the min and max values i saw when cruising not sure when they happend. Will get a log tomorrow.
Ok. My understanding is that Min/max is mostly irrelavant. When you are on decel or just barely tipping into the throttle some funky values can register. AF correction should be +/-5 while cruising and under light load.
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Old 01-13-2021, 10:04 AM   #5
maverpl
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Quote:
Originally Posted by dpetro1 View Post
Ok. My understanding is that Min/max is mostly irrelavant. When you are on decel or just barely tipping into the throttle some funky values can register. AF correction should be +/-5 while cruising and under light load.


I have recorded 3 logs, im gonna post them later after work. I noticed that one spike up to 30 was when the car was idling at gas station, oil temp was around 140 so it was still warming up.
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Old 01-13-2021, 04:21 PM   #6
scotte30m3
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https://phatbottituning.com/buy-an-e...roubleshooting

read this... it will answer your questions and give you direction.

#phatbotti
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Old 01-13-2021, 05:40 PM   #7
maverpl
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Quote:
Originally Posted by scotte30m3 View Post
https://phatbottituning.com/buy-an-e...roubleshooting

read this... it will answer your questions and give you direction.

#phatbotti


Thanks, i guess nothing is wrong with my car and im overreacting. Car runs completely fine, was just worried about those high af correction numbers being high but i see now that itís normal i certain situations.
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Old 01-13-2021, 06:15 PM   #8
WMTwrx15
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I agree with it being normal, after warm up reset the min max on ap and see what it does

Just for your piece of mind

Good olí anxietyport
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Old 01-15-2021, 09:45 PM   #9
maverpl
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Here are the logs if someone with more knowledge would take a look at them i would be grateful.

https://datazap.me/u/maverpl/af?log=2&data=
https://datazap.me/u/maverpl/af?log=1&data=
https://datazap.me/u/maverpl/af?log=0&data=

First log is after i cleaned the map sensor.

thanks
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Old 01-22-2021, 12:23 PM   #10
dpetro1
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Quote:
Originally Posted by maverpl View Post
Here are the logs if someone with more knowledge would take a look at them i would be grateful.

https://datazap.me/u/maverpl/af?log=2&data=
https://datazap.me/u/maverpl/af?log=1&data=
https://datazap.me/u/maverpl/af?log=0&data=

First log is after i cleaned the map sensor.

thanks
I only see 4 parameters on the log? It would be hard to give any feedback since we cant see rpm, engine load, boost/vac, etc
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Old 01-23-2021, 01:05 PM   #11
maverpl
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Quote:
Originally Posted by dpetro1 View Post
I only see 4 parameters on the log? It would be hard to give any feedback since we cant see rpm, engine load, boost/vac, etc
Hmm that is weird since i got all the monitors set on the main screen.
Anyway i cleaned my maf and mas sensors and checked for any boost leaks, didnt find any. Af learning 1 looks better now but i still see numbers above -10 and -14 especialy when cruising on highway. AF correction looks normal, sometimes shoots up to 30% for a quick second but from what i know it's normal, especialy when letting of the throttle and coasting to a stop.

Still trying to figure out af learning and get those numbers as perfect as possible. Can a tune play a role in those numbers? I have been dyno tuned by a JR so im not sure. I'll get some new logs after cleaning those sensors.
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Old 01-24-2021, 11:14 AM   #12
dpetro1
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Quote:
Originally Posted by maverpl View Post
Hmm that is weird since i got all the monitors set on the main screen.

Anyway i cleaned my maf and mas sensors and checked for any boost leaks, didnt find any. Af learning 1 looks better now but i still see numbers above -10 and -14 especialy when cruising on highway. AF correction looks normal, sometimes shoots up to 30% for a quick second but from what i know it's normal, especialy when letting of the throttle and coasting to a stop.



Still trying to figure out af learning and get those numbers as perfect as possible. Can a tune play a role in those numbers? I have been dyno tuned by a JR so im not sure. I'll get some new logs after cleaning those sensors.
I think you are fine. If you had a tune done by a competent tuner then trust that and don't worry about the numbers too much. If you are really worried, then ask the tuner to confirm or check your log.

I don't even have my accesport plugged in all the time. When I do, I don't even monitor AF learning. Its a long term ecu determined value. I'm sure the tune map affects it but its a closed loop correction that really doesn't matter all that much to me.

AF correction should be within +/- 5% though. Again, min/max doesn't matter but while cruising and light throttle the ecu shouldn't have to make a lot of correction.
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