What are the causes of fuel pump failure?

2 Answers
Felicity
09/04/25 5:08am
Common symptoms of a faulty fuel pump include weak acceleration, jerking when accelerating suddenly, difficulty starting the engine (requiring prolonged key turning), and a humming noise while driving. The following are manifestations of fuel pump damage: 1. Pump core damage: When the fuel supply system is operating, there is no sound of the fuel pump running when the ignition is turned on. 2. Pump body damage: Due to pressure leakage, the fuel pressure cannot reach the specified value, leading to poor atomization and preventing the engine from starting. 3. Reduced lifespan: Do not wait until the fuel warning light comes on before refueling, as the fuel pump relies on gasoline for cooling. When the fuel level is too low, it cannot effectively dissipate heat, thereby reducing its service life.
Was this review help?
4
5
Share
VonCamila
09/16/25 6:09am
As an experienced driver, I've seen many fuel pump failures. The main causes include clogged filter screens, where frequent use of low-quality fuel leads to impurity buildup that blocks the mesh and stops fuel flow. Electrical issues like aging wires causing short circuits or corroded connectors breaking signals are also common, especially in older vehicles with significant wiring wear. Pump motor wear is another major factor, with long-distance driving causing overheating that burns out the coils. Voltage instability, such as a faulty generator regulator producing too high or too low voltage, can also damage the pump. Additionally, driving with an empty tank causes the pump to overheat due to lack of cooling fuel. I use high-quality fuel and keep the tank at least half full, regularly cleaning the filter screen to prevent failures, ensuring both cost savings and safe driving.
Was this review help?
14
2
Share
Expand All
More Forum Discussions

What are the differences between Auman EST and GTL trucks?

Auman EST and GTL trucks differ in the following aspects: 1. The EST is an upgraded version of the GTL with higher configurations. 2. There is essentially no significant difference between the cabins of the Auman EST and GTL, but the Auman EST super truck cabin is more high-end, featuring a simple yet rugged and luxurious interior design with strong layering, providing an ultra-large activity space that surpasses its peers, and the widest bunk at 910mm for greater comfort. Additional information: 1. Introduction to Auman GTL: The Auman GTL is China's first European standard high-quality heavy-duty truck fully developed by Foton Daimler Automotive using the Daimler quality management system across the entire value chain. The product features low fuel consumption, high comfort, and high safety, among other characteristics, and has passed the German TUV Rheinland certification, receiving the "European Standard" certification. 2. Introduction to Auman EST: The Auman EST super truck is an internet super heavy-duty truck developed by Foton Daimler Automotive in collaboration with advanced technologies from Germany, the US, and China, along with a leading supply chain system. The product adopts Daimler Mercedes-Benz platform and modular technologies, equipped with German Daimler Mercedes-Benz and American Cummins power technologies, achieving five major technological breakthroughs in fuel efficiency, intelligence, and safety.
14
3
Share

What causes the buzzing sound in Changan CS75?

Changan CS75 abnormal noise is caused by engine noise, transmission noise, and wear. The following is a specific analysis of the causes of abnormal noise in Changan CS75: Engine noise: The probability of abnormal noise in the engine compartment is relatively high. Most people also judge the source of the noise as coming from the engine compartment, usually a sharp metal sound or a wind-like noise. If the noise disappears after increasing the engine speed and there is no significant change in the noise throughout the usage process, it is considered a harmless noise that can be temporarily tolerated and repaired at an appropriate time. Transmission noise: If there is noise inside the transmission while driving, and it disappears when the clutch or accelerator is pressed, and there is a whistling-like sound when shifting gears, check whether the transmission gears are excessively worn. If the wear is too severe, replacement is needed. Also, check whether the transmission lubricant needs to be replaced. Long-term failure to replace the transmission lubricant can cause abnormal noise in the transmission. Wear: When stepping on the accelerator or brake while driving, there are always some abnormal noises from certain parts of the car body. The sound is not loud and does not affect normal driving.
9
4
Share

How early can the 2-year inspection exemption decal be obtained?

New vehicles eligible for inspection exemption can apply for the process up to three months in advance. Required documents for application include the vehicle license and compulsory traffic insurance policy. According to Article 49 of the 'Motor Vehicle Registration Regulations', vehicle owners may apply for the inspection compliance decal at the local vehicle management office up to three months before the expiration of the current inspection validity period. Relevant information about vehicle annual inspection is as follows: 1. Introduction: Vehicle annual inspection refers to a mandatory examination for all vehicles that have obtained official license plates and vehicle licenses, equivalent to an annual physical examination for vehicles conducted in accordance with the 'Technical Conditions for Motor Vehicle Operation Safety'. 2. Purpose: Vehicle annual inspections can promptly eliminate potential safety hazards, encourage enhanced vehicle maintenance, and reduce the occurrence of traffic accidents.
17
0
Share

What are the reasons for the intermittent stoppage of a car's air conditioning cooling function?

The main reason for the intermittent stoppage of a car's air conditioning cooling function is compressor issues. The compressor in the air conditioning system is equipped with a clutch, and the compressor only operates when the clutch is engaged. If the compressor is damaged and cannot switch to the engaged state, the air conditioning will not cool. If the refrigerant is sufficient but the air conditioning still does not cool at all, it may indicate that the compressor has stopped working, and you should consider repairing or replacing the compressor. Other possible causes and solutions: Air in the system can also lead to insufficient cooling. Once air enters the air conditioning system, it can cause excessive pressure in the refrigerant lines or poor refrigerant circulation, which similarly results in insufficient cooling. This is mainly due to degraded sealing of the cooling system or incomplete vacuuming during maintenance. Removing the air from the system can resolve the issue. Insufficient refrigerant. Apart from normal consumption, this is mostly caused by minor leaks in the system. If there is insufficient refrigerant in the air conditioning system, the amount of refrigerant sprayed into the evaporator from the expansion valve will decrease accordingly. This leads to reduced heat absorption during evaporation in the evaporator, resulting in lower cooling capacity. Simply repair or replace the leaking components and replenish the refrigerant to fix the issue. During high-speed driving, the rapid engine speed increases the pressure in the air conditioning system. The compressor may stop operating due to excessively high pressure control, causing the cooling function to pause temporarily. In this case, slowing down the car to allow it to cool down will restore normal operation.
7
1
Share

Is It Normal for Car Air Conditioning Pipes to Be Wet?

It is normal for car air conditioning pipes to be wet, indicating that the air conditioning cooling effect is good. Here are the relevant details about car air conditioning: 1. Function: Car air conditioning refers to the air conditioning device installed in the car, which can cool, heat, ventilate, and purify the air inside the compartment, providing a comfortable riding environment for passengers, reducing driver fatigue, and improving driving safety. 2. Structure: Car air conditioning generally includes a cooling device, heating device, and ventilation device. This combined system makes full use of the limited space inside the car, with a relatively simple structure and convenient operation, making it a popular modern car air conditioning system internationally.
2
3
Share

Do Pure Electric Vehicles Have Transmissions?

Pure electric vehicles do not have transmissions. Most pure electric vehicles only have a reducer, which can lower the speed and increase torque, allowing the car to operate normally. Pure electric vehicles also do not need transmissions, as their electric motors have a wide speed range, enabling direct speed adjustment through the motor. The power output method of pure electric vehicles is more suitable for stop-and-go urban roads, and these vehicles produce no tailpipe emissions while driving. A pure electric vehicle refers to a vehicle that uses an onboard power source as its power, drives the wheels with an electric motor, and meets all the requirements of road traffic and safety regulations.
13
3
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.