AF Learning and Bad Gas Mileage

paytonzellers · 01-29-2020, 11:38 AM

Stupid question, I have a 2013 Wrx, only mods are Cobb SF Intake, N1 catback, and Accessport V3. Currently running OTS Stage 1+SF 91 OCT, and use 93 gas from exxon. My AF Learning numbers are (-3.91,4.18) and AF correction 1 is (-21,14) normally. I am only getting around 14-16 mpg and drive pretty conservative. I let it warm up about 5 minutes, and my commute is about 15 minutes to work. Would this be caused by a boost leak? Or possibly a bad front O2 sensor? Any help would be appreciated. If needed I have data logs of 2 3rd gear pulls.

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BurninSTI · 02-03-2020, 10:25 PM

I'm dealing with AF issues now... how many miles on the car?

paytonzellers · 02-03-2020, 11:59 PM

Quote:

Originally Posted by BurninSTI

I'm dealing with AF issues now... how many miles on the car?

88k as of tomorrow most likely

BurninSTI · 02-04-2020, 09:05 AM

Post or send me the logs, Ill take a look.

Scorpius · 02-04-2020, 10:45 PM

Check your turbo inlet for tears.

Jersey Man10 · 02-04-2020, 11:12 PM

Custom tune would help since ots tunes are meh. MAF sensor might need replacing. In all honesty its probably the intake causing problems. Try switching back to stock and see what results you get.

Scorpius · 02-05-2020, 06:30 PM

I'm guessing since it's running so rich it's getting unmetered air after the maf somewhere.

BurninSTI · 02-06-2020, 02:27 PM

Is it dripping gas while idling?

01-29-2020, 11:38 AM	#1
paytonzellers Scooby Newbie Member#: 503104 Join Date: Jun 2019	AF Learning and Bad Gas Mileage Stupid question, I have a 2013 Wrx, only mods are Cobb SF Intake, N1 catback, and Accessport V3. Currently running OTS Stage 1+SF 91 OCT, and use 93 gas from exxon. My AF Learning numbers are (-3.91,4.18) and AF correction 1 is (-21,14) normally. I am only getting around 14-16 mpg and drive pretty conservative. I let it warm up about 5 minutes, and my commute is about 15 minutes to work. Would this be caused by a boost leak? Or possibly a bad front O2 sensor? Any help would be appreciated. If needed I have data logs of 2 3rd gear pulls. * Registered users of the site do not see these ads.

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02-03-2020, 10:25 PM	#2
BurninSTI Scooby Newbie Member#: 510655 Join Date: Jan 2020	I'm dealing with AF issues now... how many miles on the car?

02-04-2020, 09:05 AM	#4
BurninSTI Scooby Newbie Member#: 510655 Join Date: Jan 2020	Post or send me the logs, Ill take a look.

02-04-2020, 10:45 PM	#5
Scorpius Scooby Specialist Member#: 370806 Join Date: Oct 2013 Location: Northern Indiana Vehicle: 2019 WRX/STI DGM 2016 WRX/STI ISM	Check your turbo inlet for tears.

02-04-2020, 11:12 PM	#6
Jersey Man10 Scooby Newbie Member#: 427632 Join Date: Aug 2015 Chapter/Region: TXIC Location: Texas Vehicle: 2011 Impreza WRX Satin White Pearl	Custom tune would help since ots tunes are meh. MAF sensor might need replacing. In all honesty its probably the intake causing problems. Try switching back to stock and see what results you get.

02-05-2020, 06:30 PM	#7
Scorpius Scooby Specialist Member#: 370806 Join Date: Oct 2013 Location: Northern Indiana Vehicle: 2019 WRX/STI DGM 2016 WRX/STI ISM	I'm guessing since it's running so rich it's getting unmetered air after the maf somewhere.

02-06-2020, 02:27 PM	#8
BurninSTI Scooby Newbie Member#: 510655 Join Date: Jan 2020	Is it dripping gas while idling?