Hello everyone, I was researching how to tune the BMW N54 engine because I will be buying a 135 or 335 in the spring and I came across a mention that it is possible to remove cold start mapping in the ECU.

My Versa screams when I start driving it below 0 degrees outside because the CVT won't shift and the RPMs go well into 4-5000 rpm. This makes me super uncomfortable and I'd love a way to get rid of this emissions protocol in the ECU.

I have a 2012 Versa 1.8 CVT

Thank you in advance

Matt

Ehhh, I wouldn't go around messing with that just because of high revs shortly after startup. Chances are, there's more to it than just emissions, like getting the engine to operating temp faster so as to reduce engine wear from overly viscous oil. Something engineers would be privy to. Just cause someone does something doesn't always mean it's a good idea. Happens all the time in Z32, lol.

That sounds more like a trans issue than electronics for cold start. RPM going to 5K is an emissions MAKER.

Yeah I'd probably rather just put in a remote start and let the thing warm up a bit before taking it out and driving it.