What are the reasons for high fuel consumption in electronically injected diesel vehicles?
2 Answers
High fuel consumption in electronically injected diesel vehicles is due to excessively rich idle air-fuel mixture or excessively high fuel line pressure. The following are precautions to reduce fuel consumption in electronically injected diesel vehicles: 1. Adjust or replace the fuel injector: The fuel supply system affects the quality of the fuel injection pump and injector in the fuel supply system, directly determining the combustion state of the diesel engine. Non-compliant fuel injection pump flow and poor injector atomization are the main causes of poor combustion. Insufficient fuel injection pump pressure, poor or untimely maintenance of the injector can lead to poor diesel atomization and incomplete combustion, resulting in significant fuel leakage and waste. This leaked fuel not only causes waste but also generates a large amount of carbon deposits in the combustion area of the diesel engine, affecting the efficiency of the diesel engine and turbocharger, further reducing the diesel engine's output power and increasing fuel consumption. 2. Adjust the fuel intake of the high-pressure fuel pump: The turbocharging system of the diesel engine is an effective way to increase the power of the diesel engine and improve its economy. The working condition of the turbocharger greatly affects the performance of the diesel engine. Maintaining the turbocharger pressure at a scientifically reasonable level is a prerequisite for ensuring the diesel engine operates in good condition.
With decades of experience in auto repair, I've seen numerous common causes of high fuel consumption in electronically controlled diesel vehicles. Clogged fuel injectors top the list - accumulated dust obstructs proper fuel spray, reducing combustion efficiency. A dirty air filter restricts airflow, forcing the engine to work harder. Underinflated tires increase rolling resistance, consuming more fuel. Faulty or aging fuel injection pumps can cause inaccurate fuel delivery. Driving habits like aggressive acceleration and high-speed driving significantly increase consumption. During cold starts, slow engine warm-up leads to temporarily higher fuel usage. Regular inspections of these components, along with timely oil and filter changes, can effectively prevent issues. I recommend maintenance every 5,000 kilometers to keep the vehicle in optimal condition.
