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Old 09-11-2012, 04:41 PM   #1
patrickrobare
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Join Date: Jun 2012
Chapter/Region: Tri-State
Location: Plattsburgh
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2012 impreza WRX
pearl blue

Default How To tune out leanness

Im using the torque app on my phone and my cafr (called air fuel ratio) and the mafr (measured air fuel ratio) read the same when im hard on the throttle but once i lift off the cafr is around 14:1 and my mafr is <20:1. Is this bad and how do i tune this out? i have a stock air box and i took off my bov cuz thats the only thing i changed so far. my ap comes in tomorrow so should i try to tune it out? is it bad?
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Old 09-11-2012, 04:44 PM   #2
guroove
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Obsidian Black Pearl

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When it drops to <20:1 after throttle lift, it is only displaying the most lean AFR it can measure. What is actually happening is that there is no fuel going through the cylinders and the engine is engine braking. This is normal, and there's no need to tune it out.
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Old 09-11-2012, 04:49 PM   #3
patrickrobare
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okay lol i was freakin out lol. do you know if you can cut a whole in the bottom of the airbox? ive seen people do it because theirs another tube that drops down into the fender but its blocked off by plastic. if you did this wouldnt you be making your own cold air or ram air intake? it still runs through the filter ill post a pic when i get outa class
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Old 09-11-2012, 07:44 PM   #4
bacalhau16
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Silver

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There are many threads about that mod. The search function is your friend.
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Old 09-11-2012, 10:07 PM   #5
Black94Snake
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its best NOT to modify the stock airbox. it's design is more than enough to supply your car.
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