If you are now running the generator on the liquid side of the LP tank, what you are probably smelling is the mercapsan oil (odor-ant) that has accumulated at the bottom of the tank and in its concentration is not burning up completely. Once you run this excess out out of the system, it will probably start running without as much odor as now.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7