What are the causes of insufficient fuel supply to the engine?

[DiSamuel]

Here are the specific reasons for insufficient fuel supply to the engine: 1. Fuel tank issues: No fuel in the tank or the fuel tank switch is not opened. 2. Pipeline problems: The pipeline from the fuel tank suction pipe through the gasoline filter, fuel pump to the fuel distribution pipe inlet pipe joint has faults such as blockage, oil leakage, water accumulation, icing, or vapor lock. 3. Fuel pump problems: The electric fuel pump is not working properly or has failed. Here is additional information on the symptoms of insufficient fuel supply to the engine: 1. Difficulty starting: The car engine cannot start normally or gradually stalls when turning. 2. Abnormal oil pressure: When checking the fuel supply pressure of the fuel supply device, the oil pressure is too low or zero. 3. Insufficient power: The engine can start, but the power is significantly insufficient, and acceleration is poor.

[Caleb]

I often ponder the issue of insufficient fuel supply in engines. The most common culprit is an aging or malfunctioning fuel pump, which typically starts failing after about ten years or 80,000 kilometers of use—when the pressure drops, fuel delivery suffers. A clogged fuel filter in the system is another headache, as accumulated dust or debris restricts fuel flow. Excessive carbon buildup in the fuel injectors can also cause misfires; I've personally experienced jerky acceleration due to this. Faulty sensors, like those for fuel pressure or fuel level, frequently cause trouble too—when they fail, the ECU miscalculates fuel injection, leading to engine shuddering or even stalling. Never push the engine when the tank is nearly empty or fuel levels are critically low. Regular maintenance and inspections are key: replace the fuel pump and filter every two years, and don't wait for problems to arise before taking action.

[StEdward]

I've summarized the root causes of insufficient fuel supply during DIY car repairs. First, check if the fuel pump is working properly—listen for a humming sound when starting the engine; if it's too quiet, the pump might be faulty. If the fuel filter is dirty, replace it directly, as a clogged fuel line can be troublesome. Clean the fuel injectors if they have carbon buildup; too much buildup leads to uneven fuel spraying. Sensor failures are more common, such as pressure sensors falsely reporting high or low fuel pressure, causing the ECU to give incorrect commands. Don't push it when the fuel tank is low—refuel promptly. Pay attention to signs like unstable idling or weak acceleration in daily use. Safety first—always disconnect the battery before repairs and avoid fuel leaks that could cause a fire.