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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > B58 Turbo Engine / Drivetrain / Exhaust Modifications > bm3 stage 2
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      04-28-2021, 08:15 PM   #1
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bm3 stage 2

Just flash to bm3 stage 2 from stage 1.
I have gts start up roar turned on for both tune, but for some reason my start up for stage 1 is much louder and longer for at least 15 secs compare to stage 2 which is way quieter and only last for 2 secs.
Is there a reason for this?
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      04-29-2021, 08:39 AM   #2
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Did you deactivate the cold start? That's the only thing I can think of. If you're catless, you dont need the cold start anymore; it's obnoxiously loud and annoying anyway.
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      04-29-2021, 09:02 AM   #3
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reflash and make sure you did not accidentally deactivate the cold start
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      04-29-2021, 09:26 AM   #4
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Same thing happened to me. Flashed stage 2 recently and I’m sure that I didn’t deactivate cold start. At least the neighbors are more happy now.
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      04-29-2021, 08:53 PM   #5
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I fixed it, just have to make sure you have cold start on OEM.
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