When an electronic fuel injection diesel engine suddenly stalls and fails to restart, there could be several possible reasons. Here are some common causes and their corresponding solutions:

FUEL SUPPLY ISSUES:

-Check the fuel tank to ensure an adequate supply of fuel and that the fuel supply lines are not blocked.

-Inspect the fuel filter;if contaminated or clogged, it may need replacement.

-Verify the proper functioning of the fuel pump. If it’s damaged, repair or replacement might be necessary.

AIR SUPPLY PROBLEMS:

-Examine the air filter;if contaminated or blocked, clean or replace it.

-Inspect the intake pipe for any blockages or air leaks.

Check the air sensor;a damaged or malfunctioning sensor could prevent the engine from starting.

IGNITION SYSTEM PROBLEMS:

-Check the battery level to ensure it has sufficient charge;low battery power might prevent the engine from starting.

-Inspect the ignition coil and spark plugs;if the coil is damaged or the plugs are expired, replacement might be needed.

-Verify the proper functioning of the ignition switch.

TEXTMECHANICAL ISSUES:

-Check the crankshaft sensor, responsible for measuring the speed and position of the crankshaft. A malfunctioning crankshaft sensor might prevent the engine from starting.

-Inspect the engine’s compression ratio. A low compression ratio could make it difficult for the engine to start or prevent it from starting altogether.

FUEL INJECTION SYSTEM PROBLEMS:

-Inspect the injector nozzles to ensure they are not blocked or damaged.

-Check the injection pump to ensure its normal operation.

-If using diesel additives, ensure the quality of the additive meets the required standards.

If unable to determine the specific cause or solution, it’s advisable to seek professional technical support or consult experienced diesel engine mechanics to ensure the problem is correctly diagnosed and effectively resolved. Regular maintenance of the diesel engine can also help reduce the occurrence of unexpected failures