High AF Correction?

[maverpl]

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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[dpetro1]

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.

[maverpl]

Originally Posted by dpetro1

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.

[dpetro1]

Originally Posted by maverpl

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.

[maverpl]

Originally Posted by dpetro1

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.

[scotte30m3]

https://phatbottituning.com/buy-an-e...roubleshooting

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

#phatbotti

[maverpl]

Originally Posted by scotte30m3

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 it’s normal i certain situations.

[WMTwrx15]

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 ol’ anxietyport

[maverpl]

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

[dpetro1]

Originally Posted by maverpl

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

[maverpl]

Originally Posted by dpetro1

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.

[dpetro1]

Originally Posted by maverpl

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.