True or false can you help?

1 a primary reason for using an ECU is to maintain a very lean air-fuel ratio





#2 Many modern vehicles combine the functions of an engine control computer and other vehicle computers into a single electronic control unit|||1 false, not lean but efficient,#2 false, even though they are hooked together with a data wire its not one ECU|||1 There is no "primary" reason for the ecu, it keeps your air/fuel stoich, emissions down, and all-round drive-ability good.


#2 They can have any number of abilities, older ECUs only do the primary functions, whereas more modern ones shift the automatic transmission, work with anti-theft ignition systems, cruise control and any other number of things a car maker may choose.