What are the symptoms of a faulty high-pressure fuel pump in the Magotan?
2 Answers
High-pressure fuel pump failure conditions: 1. Inability to reduce speed: Pseudo-runaway refers to the diesel engine starting with normal idle speed, but failing to decelerate after releasing the throttle when accelerated to high speed. This occurs when the injector plunger wears out, causing the fuel rack to remain at the idle fuel quantity position. Once the throttle is released after acceleration, the fuel rack can return to the idle position, but the governor's moving parts and transmission components, due to excessive wear, get stuck in the high-speed position, preventing speed reduction. If this phenomenon occurs, the fuel injection pump must be inspected and repaired. 2. Fuel rack stuck in the no-fuel position: If no fuel comes out of the high-pressure fuel line, but there is fuel in the low-pressure circuit, and the diesel engine fails to start, it indicates that the fuel rack is stuck in the no-fuel position. In this case, the fuel injection pump also needs immediate inspection and repair. 3. Fluctuating speed: This is a sign that the fuel rack is not moving smoothly or that the internal components of the governor are excessively worn, leading to increased clearance. Therefore, the fuel injection pump also requires inspection and repair.
My previous Magotan had a faulty high-pressure fuel pump, and the car became like a patient. It was sluggish when starting, lacked power when stepping on the accelerator, and the acceleration was particularly sluggish. Sometimes it would stall as soon as I turned the key, requiring several attempts to start. During normal driving, it occasionally shook, and on the highway, it would suddenly lose power, which was quite unsettling. The worst part was when the engine warning light suddenly came on, accompanied by a creaking noise, similar to metal rubbing. Opening the hood, I noticed a faint smell of gasoline, possibly indicating a slight leak. I rushed to get it repaired, and the mechanic said it was due to insufficient pressure. If not addressed promptly, fuel consumption would skyrocket, and other parts could even get damaged, posing significant safety risks. Friends, if you encounter similar issues, don’t hesitate—go straight to a professional repair shop for an inspection to avoid accidents on the road.
