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What are the reasons for insufficient power in electronically controlled National IV diesel vehicles?

1 Answers

IslaFitz

07/29/25 4:47pm

Below are the related reasons for insufficient power in electronically controlled National IV diesel vehicles: 1. Symptoms of insufficient power: Reflected in acceleration performance and climbing ability, especially under heavy load conditions, the diesel engine power will be significantly insufficient, the throttle response will be sluggish, the vehicle speed cannot increase rapidly accordingly; the exhaust is dull, the driving is weak, fuel consumption rises sharply, and the occurrence is sudden, mainly judged by the driver's feeling in daily operation. 2. Fuel supply system: Fuel tank (fuel pipeline) - coarse filter - fuel transfer pump - fine filter - high-pressure fuel pump - common rail pipe - fuel injector. 3. Intake and exhaust system: Air filter - intake hose - turbocharger - intercooler - combustion chamber - exhaust pipeline (exhaust brake butterfly valve) muffler. 4. Electrical system: The electrical system includes the engine control unit ECU, sensors, wiring harnesses, and all connectors and other circuits that transmit electrical signals. Insufficient power in diesel engines caused by the electrical system is generally sudden, without warning. It is usually caused by minor issues such as loose connections, disconnections, broken wires, sensor damage, excessive gaps, etc.

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