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What are the reasons for the inability to accelerate in an electronically controlled diesel engine?

2 Answers

ParkerMarie

08/26/25 5:06am

Here are the reasons for the inability to accelerate in an electronically controlled diesel engine: 1. Fuel metering function failure: Damage to the vehicle's fuel metering function can lead to the inability to accelerate, usually caused by severe wear of the internal plunger in the vehicle's fuel metering unit. If the vehicle cannot accelerate, it is advisable to first check if there is an issue with the diesel metering function. 2. Injector damage: Internal damage to the injector can result in incorrect fuel injection and return quantities, leading to insufficient vehicle power and thus the inability to accelerate. Sometimes, a damaged diesel pump can also cause this issue. 3. Incorrect wiring connections: Incorrect connections in the wiring and connectors can also cause the inability to accelerate, similar to how a disconnected injector plug in the engine can prevent a cylinder from working. Poor connections in the vehicle's injector wiring can also lead to the inability to accelerate.

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Matteo

09/08/25 6:57am

I've been driving an electronically injected diesel car for several years and have encountered quite a few issues with poor acceleration. The most common problem is a clogged fuel filter, which is located at the front end of the fuel line—when it gets too dirty, the fuel flow isn't smooth. Another issue is clogged fuel injectors; dirty diesel or high mileage can lead to carbon buildup, affecting fuel injection. The engine starts sluggishly, and pressing the accelerator doesn't yield any response. Air leaks in the fuel system can also cause insufficient pressure, leading to weak acceleration. Additionally, if the high-pressure pump is worn out, the fuel pressure drops, resulting in imprecise injection. Sometimes, the electronic control module malfunctions, with sensors sending wrong signals and the computer making incorrect adjustments. I recommend starting with simple checks, like replacing the fuel filter. If that doesn't work, take it to a shop for a thorough inspection of the fuel and electrical systems. Regular maintenance can prevent such issues—safety always comes first.

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