Hey guys I need some today I started my car 2001 Nissan Altima after three days of sitting the temperature dropped every night to around 3°c and warmed through the days to around 15°c max when I tried starting it today it was extremely rough misfired stalled and there was white smoke very briefly but went way when she started and idled I didn’t smell and coolant so is the anything else that would cause this apart from head gasket leaks?

flooding out engine will smoke on starting and smell like raw exhaust out the pipe.