The electronic engine management system allows you to realize the following advantages:
- Accurate fuel dosage in any operating mode, which ensures low fuel consumption at high power.
- Reducing the content of harmful substances in exhaust gases due to precise fuel dosing and the use of a catalytic converter.
- Self-diagnosis of the engine management system, provides the ability to quickly find faults. The engine management system has a fault memory. If a defect is detected during operation, it is stored in the instrument's memory. If the engine has malfunctions, then using a special device, you can display their list, which allows you to identify and eliminate the defect yourself. Refer to Section Troubleshooting. It is desirable to carry out work in the conditions of a service station.
The engine control unit is a minicomputer with high speed. It determines the optimum injection time and the amount of fuel to be injected. In this case, the operation of the control unit is coordinated with other vehicle systems, for example, with the gearbox control system or the anti-theft lock.
Elements of the engine management system retain their high performance for a long time and require virtually no maintenance. Maintenance replacements require only the air filter and spark plugs. Serious adjustment and repair work requires the use of sophisticated diagnostic tools. Refer to Section Troubleshooting.
Adjustment of the idle speed and CO concentration is not required as part of the maintenance.
Safety Precautions When Working on the Engine Management System/Petrol Engine
The fuel system is under pressure! If the system is opened, fuel may be ejected. Therefore, leaked fuel must be wiped with a cloth. Gasoline vapors are poisonous and flammable. Wear protective goggles. Keep the workplace well ventilated. Have a fire extinguisher ready.
To prevent personal injury and/or damage to the injection and ignition system, the following must be observed:
- Do not touch or disconnect the ignition wires while the engine is running or the starter is engaged.
- Disconnect and connect the pipelines of the injection system and the ignition wires, as well as the electrical wires of the measuring instruments only with the ignition off.
- It is not allowed to work with the electronic ignition system for people with a heart pacemaker.
- Do not inject fuel when checking compression.
When working on the injection system, the general rules of safety and cleanliness must be observed, refer to Section Safety precautions and cleanliness when working with the fuel system.