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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > Rough RPM drop when going into gear after BM3 Flash
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      01-12-2021, 04:05 PM   #1
slof30
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Rough RPM drop when going into gear after BM3 Flash

Hello.

So I flashed my car with BM3 for the first time about a week ago. Car Idles at about 8-900 RPMs in comfort idling. (Cold start delete active). Stage 2 /w transmission flash.

I notice that when I put the car into drive, you can feel the RPMs jerk as it lowers to about 600. It's a very rough feeling.

I was noticing that when coming to a stop, the RPMs were dropping below 500 than bouncing up, although this has since been resolved.

I've driven the car about 30 miles since flashing it since my license is suspended for a few more weeks.

I was just wondering if this is normal while the car still adjusts to the tune, or if something else is going on. I've heard that it can take roughly 75-100 miles and you could experience some weird issues while it breaks in, but I'm not sure how accurate that is.

Thanks for any help.
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      01-13-2021, 12:07 AM   #2
RMachuca3d
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you cant just drop "license suspended" and not explain in detail why.
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      01-13-2021, 12:47 AM   #3
slof30
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Quote:
Originally Posted by RMachuca3d View Post
you cant just drop "license suspended" and not explain in detail why.
104 in a 55 lmfao 11 point ticket which is automatic suspension
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      01-13-2021, 03:51 AM   #4
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Sometimes the Learned Adaptations Reset procedure under the Diagnostics tab in bootmod3 does the trick.

Try it out.
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      01-13-2021, 07:48 PM   #5
slof30
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Quote:
Originally Posted by phorge View Post
Sometimes the Learned Adaptations Reset procedure under the Diagnostics tab in bootmod3 does the trick.

Try it out.
Thanks for the tip! I'll try it out tm morning
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