EEC stands for Electronic Engine Control; and it is the computer which Ford uses to electronicly control vehicle functions. Dont think about your home computer; this one does not crash and needs almost no attention. Fuel injection computers are part of a broader title called Programmable Fuel Management Systems, whose main function is to supply a mixture of fuel and air to the engine that can be easily ignited by spark to produce reliable efficient power. Sounds simple enough. The name “Electronic Engine Control” is commonly abbreviated to EEC but pronounced as eek.” This computer has chips for memory, micro-relays to control actuators, a processor to run the show, and a program to keep it all working smoothly. It looks to sensors to learn what environment the engine is operating in. It also looks at driver inputs to learn what you want to do. It processes the information it receives and calculates what the best fuel mixture and timing setting should be. It then activates those actuators to implement the previously calculated fuel mixture and timing. It cycles back to listen to the sensors again to insure the outcome was what the driver and computer wanted. All that happens in a millisecond and repeats at speeds so fast it can adjust calculations between firing cylinders at 6000+RPM. When its all working in harmony it will last for over 30 years with only basic maintenance.