[johnsjmc]

Ontario tests vehicles on a dyno at idle and 25mph . Sniffs 3 gases HC,Nox and CO Plus gas tank cap seal is verified.Exhaust systems are supposed to be leakfree to be able to be tested. Vehicles are tested every other year . No testing on pre 1988 cars but catalysts and other equipment can,t legally be removed /disabled. A gross polluter (oil burner cloud) can be stopped by the police and ordered off the road until repaired but that seldom happens. There is a $400 repair limit for a failed car.Taxis and commercial are also tested but there is no cap on repair costs.. There are fewer old cars still on the road here than Florida as our cars are subjected to winter road salt.Some norther counties are not tested presumably because of small numbers of cars. More travel by snowmobile you know