Sluggish acceleration / MAF adaptation / Mean quantity adaptation

eee91 · 05-06-2021, 09:07 PM

I recently bought an 2006 e91 320d automatic (163hp).
The seller said it has been remapped (around 200hp/400nm).

I noticed the car had become pretty slow in general.
The best 0-60mph time i could get was around 10 seconds.
There wasn't a big loss of power at a specfic RPM. The car just felt slow in general.

I had a code 3FC0. I read on some forums that it could be solved by reseting MAF adaptations. People also said mean quantity adaptations should be reset at the same time.

The MAF adaptation values were before 2003.2 / 651.9 (Idle / Load). I reseted them and mean quantity adaptations. They were set to 0 / 0. After driving around 15 miles (and turning the car off 3 times during that trip) the MAF values were still stuck on 0 / 0.

The code 3FC0 is now gone but now the car feels even slower compared to the starting point

I started wondering, could reseting these 2 things possibly cause the remap to be "lost" and return to factory settings?

Or is the slow feeling only because of the MAF values still being 0 / 0. Should there be some new values after driving 15 miles or how long should it take?

Also tips on solving the sluggish acceleration problem are much appreciated.

Thanks a lot in advance!

E92_William · 05-06-2021, 10:55 PM

Resetting that won't cause you to lose the remap at all. It sounds like the maf is dead as it's not showing anything but I'd post this in the m57 section if I was you as there are knowledgeable diesel guys there

eee91 · 05-07-2021, 05:11 AM

Alright, thanks i will! Just to be clear, the MAF values themselves are showing correct (at least seems to be) values. The MAF adaptation values are stuck on 0 / 0.

05-06-2021, 09:07 PM	#1
eee91 Registered 0 Rep 3 Posts Drives: BMW e91 320d Join Date: May 2021 Location: Finland iTrader: (0)	Sluggish acceleration / MAF adaptation / Mean quantity adaptation I recently bought an 2006 e91 320d automatic (163hp). The seller said it has been remapped (around 200hp/400nm). I noticed the car had become pretty slow in general. The best 0-60mph time i could get was around 10 seconds. There wasn't a big loss of power at a specfic RPM. The car just felt slow in general. I had a code 3FC0. I read on some forums that it could be solved by reseting MAF adaptations. People also said mean quantity adaptations should be reset at the same time. The MAF adaptation values were before 2003.2 / 651.9 (Idle / Load). I reseted them and mean quantity adaptations. They were set to 0 / 0. After driving around 15 miles (and turning the car off 3 times during that trip) the MAF values were still stuck on 0 / 0. The code 3FC0 is now gone but now the car feels even slower compared to the starting point I started wondering, could reseting these 2 things possibly cause the remap to be "lost" and return to factory settings? Or is the slow feeling only because of the MAF values still being 0 / 0. Should there be some new values after driving 15 miles or how long should it take? Also tips on solving the sluggish acceleration problem are much appreciated. Thanks a lot in advance!
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05-06-2021, 10:55 PM	#2
E92_William Captain 1306 Rep 852 Posts Drives: 2008 BMW 328xi Join Date: Apr 2021 Location: South Florida iTrader: (0)	Resetting that won't cause you to lose the remap at all. It sounds like the maf is dead as it's not showing anything but I'd post this in the m57 section if I was you as there are knowledgeable diesel guys there __________________ Airplane Mechanic BMW Masochist
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05-07-2021, 05:11 AM	#3
eee91 Registered 0 Rep 3 Posts Drives: BMW e91 320d Join Date: May 2021 Location: Finland iTrader: (0)	Alright, thanks i will! Just to be clear, the MAF values themselves are showing correct (at least seems to be) values. The MAF adaptation values are stuck on 0 / 0.
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