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      09-03-2022, 06:44 PM   #1
MAG22
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Tach not working after Bootmod3 flash

So I just did my first flash on my 2016 M3 ZCP. I only changed some minor things like cold start, exhaust valves open only on S & S+, disabled active sound, GTS DCT, reset adaptations. Everything appears like it worked but my tachometer is pinned at 8.5k and won't move. It jumps up at startup, but never goes back down. Has anyone had this happen?
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      09-03-2022, 07:45 PM   #2
JAI///M3
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Are you on E85? Certain tunes use the tach to display ethanol content if you have a sensor too. Just a thought
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      09-03-2022, 07:56 PM   #3
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No. Just normal 91 on a stock tune.

I’m wondering if it was the engine tune, the transmission tune or the adaptation reset.
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      09-03-2022, 11:58 PM   #4
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Flash again, same tune.
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'18 F80 Base 6MT | '19 F82 Exec DCT | '18 F82 Comp Exec DCT | '23 G80cx
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      09-28-2022, 11:06 AM   #5
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To anyone that had this happen…nothing worked that I could have done. But Sergio spent a couple minutes with me on Sunday and took care of it. Big shout out to tho PTF guys.
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