another p0300 question

[Xotik H3]

The evap is more than likely not causing your issue. I would look at changing the fuel filter first, then you can check you intake gasket with some "starting fluid". Spray the starting fluid around the intake ports, if it leaks the RPM will increase with starting fluid... always the simple things first.

Your O2 sensors could cause such an issue - which is what I would lean towards, they can be pricey though.

Curious, what color was the smoke and was it a one time thing or every time you start it - cold or warm?

Have you pulled any spark plugs to check for color?

How much fuel is in the tank? Have you filled it up with the same symptoms?