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M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > Could fuel cause this?

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      04-15-2019, 06:04 AM   #1
Frequentflyer12
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Could fuel cause this?

Hi all
Had my 2017 m2 dynoed and made good power. However, my Afr seems to go crazy at full power. The fuel here in OZ is 98 octane.
Could it be that the fuel pumps just cant keep up ? Drives great on the road, but a bit concerned if i take it to the strip.
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      04-19-2019, 02:58 PM   #2
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More than likely... it's a problem with your dyno shop's analyzer picking up an electrical noise thats translated into what you see.
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      04-21-2019, 06:22 AM   #3
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Quote:
Originally Posted by NitroBMW View Post
More than likely... it's a problem with your dyno shop's analyzer picking up an electrical noise thats translated into what you see.
Ok thx Nitro , it goes back on the dyno Wednesday. My tuner also thinks the positioning of the afr sensor could be wrong or that the exhaust valves are closing .
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      04-23-2019, 11:50 PM   #4
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Update on shitty fuel

Looks like the fuel quality was the problem.
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