Difficulty starting an electronic fuel injection diesel engine is a common problem that may be caused by various factors. Here are some possible steps and suggestions to address this issue:

　　1、 Check basic conditions

　　1. Battery level: First, check if the battery level is sufficient. Insufficient battery level will directly affect startup. If the battery is low, it should be charged or replaced in a timely manner.

　　2. Environmental temperature: Consider whether the environmental temperature is too low. Low temperature can affect the viscosity of lubricating oil and the combustion performance of diesel, thereby increasing the difficulty of starting. In low-temperature environments, the cylinder can be preheated by multiple attempts to start.

　　2、 Check the intake and fuel systems

　　1. Air intake system:

　　Check if the air filter is clean. If it is too dirty, it will affect the intake volume and should be cleaned or replaced in a timely manner.

　　Check if there is any air leakage in the intake pipeline, as air leakage can cause the mixture to become too lean and affect starting.

　　2. Fuel system:

　　Check if the fuel filter is clogged. If it is clogged, it will affect the fuel supply, and the fuel filter should be replaced regularly.

　　Check whether the fuel injector is blocked or damaged, which will affect the fuel injection effect. If necessary, clean or replace the fuel injector.

　　Check if the fuel pressure is normal. Low fuel pressure can affect the injection amount of fuel, and the fuel pressure should be checked and adjusted.

　　3、 Check the ignition and control system

　　1. Ignition system: For diesel engines, although there is no traditional spark plug ignition, the high-pressure fuel pump and injector in the electronic fuel injection system are also key components of the ignition system. Check their working status to ensure there are no faults.

　　2. Control system: Check whether the sensors and actuators of the engine control system are working properly, such as water temperature sensors, pressure sensors, etc. The signals from these sensors directly affect the control and starting of the engine.

　　4、 Other inspections

　　1. Carbon deposition issue: Check if there is excessive carbon deposition at the throttle valve and idle valve. Excessive carbon deposition can cause blockage of the idle airway, affecting the intake. If necessary, cleaning should be carried out.

　　2. Mechanical failure: Check whether there is a mechanical failure in the engine, such as cylinder gasket leakage, low cylinder pressure, etc. These faults will all affect the starting of the engine.

　　5、 Professional maintenance

　　If none of the above checks can solve the problem, it is recommended to send the vehicle to a professional car repair shop for further inspection and maintenance. Professional maintenance personnel will use professional equipment and technical means to find and solve start-up difficulties.

　　Overall, the difficulty in starting an electronic fuel injection diesel engine may be caused by various factors, and it is necessary to investigate and take corresponding solutions one by one. During the inspection and maintenance process, attention should be paid to safety and the correct operating steps should be followed.