Angus
Well-known member
These auto start and stop systems function by cutting fuel, not ignition. The emissions are not effected since the engine is warm and running closed loop. On the EPA test cycle there is a stopped idling section and manufacturers say it saves 5% on that test. To get credit for the savings it has to be automatic (but cane turned off). They do have to fortify the starters since they have to start the car a 100 times more often with the system.