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Old 02-02-2013, 10:46 AM   #12
Cobb Tuning
NASIOC Vendor
 
Member#: 4803
Join Date: Mar 2001
Location: Austin, DFW, Portland, SOCAL
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Quote:
Originally Posted by JOHN2011WRX View Post
TURNED CAR ON AND LET IDLE FOR ABOUT 5 MIN
https://docs.google.com/spreadsheet/...4SjVnRmc#gid=0

AFTER IDLING FOR ABOUT 10 MIN, A/F LEARINING WAS AROUND 10 WHEN I GIVE IT THROTTLE IT STARTS TO GO DOWN
https://docs.google.com/spreadsheet/...uaEJDOVE#gid=0

TOOK THE CAR FOR A DRIVE THIS IS 1-3RD GEAR
https://docs.google.com/spreadsheet/...VNU9NX2c#gid=0
You are running the stock intake, correct?

I would say that you probably have an intake tract leak. This lets in unmetered air that causes the car to go lean and therefore A/F Learning 1 increases to compensate (in this case +10% is extreme). Your best bet is to get a pressure or smoke test of the intake tract done. This can be done by various shops (although I would try to stick to a Subaru performance shop). If you have an air compressor, you can also build your own pressure test rig (search for DIY pressure test here on Nasioc).

If you find a leak and fix it, then reset your car's ECU via the function found in the troubleshooting menu of the Accessport. Then do additional data logging to confirm. A/F Learning 1 is actually determined from 4 stored values that are determined/applied based on different airflow ranges -> A/F Learning 1 A,B,C,D. You can view all these at once by simply logging them or viewing via live data (so you won't have to actually drive to hit all 4 ranges).

Bill
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