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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > N52 Normal AFR and Fuel Trim Readings



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      01-17-2015, 01:08 PM   #1
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N52 Normal AFR and Fuel Trim Readings

Hi guys. Changed out some components to the car, everything feels nicer so I am happy no more hesitation. Can someone help me out with datalogging? I am using the OFT to check realtime values and I wanted to know the normal AFR bank 1 and 2 values along with the normal Fuel trim values

AFR bank 1 and 2 are around the 14.8 range usually
Fuel trim is usually around -3 to 2 range at idle
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      01-17-2015, 01:25 PM   #2
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What's the problem? Is it 14.8 while cruising or at WOT?
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      01-17-2015, 07:35 PM   #3
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here are mine, see title for details and rename files to .csv
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      01-18-2015, 12:40 PM   #4
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330I runs richer at WOT than 325i & 328i. They run stoich until high rpm.

14.8 sounds normal to me anyway
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