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What Causes a Diesel Engine to Stop Running?

Driving on the highway or out of town can bring a scary experience- if suddenly your diesel car stalls. Simply put, this means the engine has died. Annoying and causing panic at the same time, if you’re thinking what causes a diesel engine to stop running then, explore the associated reasons for the regular car maintenance that prevents the occurrence of such instances.

What Causes a Diesel Engine To Stop Running- Let’s Find The Culprits!

Diesel Engines are hard to diagnose. That’s why most of the car owners take their vehicle to a nearby maintenance station for examination of the engine. However, with the reasons stated below, now you can diagnose the problem yourself, irrespective of the place. And, with a handy repair kit, you can take a sigh of relief, especially in the middle of a highway.

1. Damaged Diesel Injectors

A diesel engine may stop due to its damaged injector.
A diesel engine may stop due to its damaged injector.

Usually, the diesel injectors fail due to the back leakage or overflow. Actually, the main culprits here are the faulty car components. Responsible for overflow and backflow in the system, these worn parts also reduce the rail pressure that halts the diesel engine.

The damaged car components can even obstruct the working of diesel injectors, which further causes low RPM or engine to stop.

2. Faulty High-pressure Pump

The improper functioning of the fuel pump will lead to low pressure in the system. Moreover, with the cracked fuel pump, different types of iron fillings can enter the system. This will exacerbate the issue by damaging injectors, which are responsible for fuel injection and ultimately, engine initiation.

3. Insufficient Air-Fuel Supply

The insufficient fuel and air itself speaks of the engine-stopping problem. With the crack or any bent in the supply line, you can expect your car’s fuel tank to be blocked by vacuum. By this, the fuel will return to the reservoir and hinder the combustion process.

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4. Blocked Filters

When the air enters the system, there’re filters installed to stop the dirt outside. However, if these air filters are not cleaned or replaced timely, then sufficient amount of air may not reach the system for the fuel combustion.

If your beloved car has all the above components working properly, then explore the further reasons of what causes a diesel engine to stop running and find the real issue.

Exactly What causes a diesel engine to stop running
Finding What causes a diesel engine to stop running

5. Damaged Relay

The faulty relay will not allow enough heat to generate for the combustion cycle in the car. Depending on glow plugs, the relay needs to work adequately along with its counterpart for the effective diesel engine initiation.

6. Flat Battery

When the battery runs down (especially seen during cold weather), the fuel pump finds it difficult to generate sufficient pressure. As a result, the engine doesn’t start due to the ineffective fuel injection.

7. Faulty Compression

Low engine compression has a direct impact on heat generation. Subsequently, it hinders the fuel ignition process and causes hard starting.

To diagnose the compression perform a diesel engine compression test. If the meter records the compression reading below the range 20-35 bars or 300-500 PSI, then your car’s engine won’t start.

Explore reasons for What causes a diesel engine to stop running
Look for What causes a diesel engine to stop running

Finally, after knowing what causes a diesel engine to stop running, you can now avoid the diesel engine stalling by taking certain precautionary steps, which otherwise may let you in trouble.

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