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      04-18-2019, 09:51 PM   #1
gman444
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Canada
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Drives: BMW M3
Join Date: Mar 2018
Location: Edmonton, Canada

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Bootmod3 Cold Start Issue

Hi guys,

So I pulled the plug and flashed my car with the bootmod3 stage 0+ GTS tune. Paired with the m performance exhaust, the tune transformed the way the car sounds.

But leaving work the next day, I noticed an issue on cold start. The car would rev up then down (almost as if it was about to stall). I immediately turned it back off and on and it was fine. I flashed it to the CS tune and noticed the same thing happen today while leaving work (+4 degrees).

Not sure if this is relevant, but this does not happen during all cold starts. Its completely fine in the mornings. I have only had it happen these two times so far (both after work, car is sitting for 8 hours). Can anyone chime in?

I don't have the cold start delete.

Thank you
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