Engine Management System
 An engine-management system or EMS refers to an electronic device which keeps track, adjusts, and controls the ignition and fuel-injection systems to ensure adequate engine control under different running conditions. It is basically a specialized computer which regulates the operation of the engine by monitoring variables such as engine load, temperature and speed. It delivers the ignition spark at the appropriate time based on existing conditions and meters the fuel to the engine according to the precise amount needed.
Two distinct subsystems work within the engine management system, namely the fuel and the ignition system. It is possible to operate an EMS even if it only provides one of the subsystems, however; the mapped ignition within an EMS is more commonly used alone than using the fuel or injection system in isolation. Production vehicles normally come equipped with non-programmable EMS, which means the maps are fixed and can't be altered by the owner. On the other hand, programmable EMS are those with maps that can be revised so the system can be mounted on various engine installations in different states of tune.
Most auto dealership services are abreast with the latest innovations in engine management systems and they are equipped with the latest scanning tools that can read all sensors fitted in your ride including air flow meter, cam angle sensor, crank angle sensor, coil packs, coolant temperature sensor, ignition modules, oxygen sensor, throttle piston sensor, and a lot more. So, if you have problems starting your vehicle, it appears to be consuming more fuel or the check engine light is on, call the pros to help you diagnose the cause of the problem and then make the necessary repairs to bring your vehicle back in top shape.