Abstract: An improved electronic control fuel injection system is disclosed wherein, during acceleration, fuel of a given amount is supplied to an engine which is commensurate with a sum formed of the amount of fuel to be burned with air in a combustion chamber, and an amount of fuel to be consumed so as to wet or moisten the inner surfaces of an intake port and the like which have been dried due to a prolonged interruption in the supply of fuel to an engine during a preceding deceleration condition. The fuel supplied to an engine through an injection valve operated by the disclosed fuel injection system at the beginning of acceleration immediately subsequent to the interruption of the fuel supply for a predetermined duration forms, with the incoming air, a desired air-fuel ratio, so that a mixture charge may be burned at the beginning of the acceleration without engine misfires occurring.