Alright I just moved to Cali. First I would go to the dealership and run a vin number search on the car. They can tell you everything the car was built with, like a cali emissions package. Second if you rereg the car, you can say it was purchased out of state and then you only need to pass federal emission test. Third replace the spark plugs, plug wires, o2 sensors, use seafoam, change the oil and then buy premium gas tne drive around for 20-30 min before you go to the trst.