Replacing carburettors with electronic fuel injection (EFI) for delivery of fuel on engines has numerous advantages. However, for each engine installation, achieving these benefits requires a comprehensive integration and calibration. The spark-ignition engine with an electronic fuel injection system compared with a carburettor unit have the following unfavourable points too.
Disadvantages of electronic fuel injection :
- High maintenance cost.
- Possibility of malfunction of some sensors.
- Difficulty in servicing.
- Complex design.
- Chances of developing leakage at the valve seat.
- Injection pressure needed 200 to 300 bar.