What are the reasons for a car fuel pump not working?
2 Answers
Reasons for a car fuel pump not working: Oil contamination is the direct cause of the fuel pump not working. Solution: Strictly follow the manufacturer's recommended fuel grade, ensure the car does not run out of fuel, and regularly maintain the fuel tank to remove impurities. Improper refueling behavior may cause the fuel pump to stop working. Solution: Follow normal refueling regulations and refuel at reputable gas stations. Driving with low fuel levels for extended periods can prevent the fuel pump from cooling, leading to poor oil quality, increased impurities, frequent clogging of the pump, and abnormal driving. Solution: When refueling, try not to wait until the fuel warning light comes on, as this shortens the pump's lifespan. Too little fuel or running out of fuel can cause the pump to malfunction. The fuel pump plunger spring may fail or break. Solution: Replace the spring with a new one. Incorrect positioning of parts. Solution: Reposition or polish the wheel body. If the pump body is cracked, replace the fuel pump immediately.
A few days ago, I was pondering this issue in the garage and found there are quite a few reasons why the fuel pump isn't working. The most likely scenario is that the fuel pump motor has completely burned out—this thing is stuck inside the fuel tank, prone to overheating and failing. It could also be a blown fuse; check the corresponding fuse box to see if it's blackened. Wiring issues are not uncommon, especially if the wires connected to the fuel pump are broken or chewed up by rodents. Listen carefully for a clicking sound from the fuel pump relay; if there isn't any, the relay might be faulty. Also, don't overlook problems with the fuel pump itself, such as a severely clogged filter screen or a stuck impeller inside. Running low on fuel can cause the pump to run dry and burn out, so don't wait for the fuel light to come on before refueling. None of these issues should be delayed—if left unchecked, the engine might not start at all. It's best to get it checked at a repair shop as soon as possible.
