What are the symptoms of a faulty fuel injector in a car?

1 Answers
MacCamilla
07/30/25 1:09am
When a car's fuel injector malfunctions, the following phenomena may occur: 1. Engine vibration: If the fuel injector is damaged, causing poor fuel injection, the engine may exhibit symptoms such as operational vibration during operation. 2. Decreased power and increased fuel consumption: As the fuel injector deteriorates, the fuel injection volume and pressure cannot be guaranteed, leading to symptoms like reduced vehicle power and increased fuel consumption. 3. Increased exhaust emissions pollution: Faults in the engine's fuel injector will inevitably affect the mixing and combustion of the combustible air-fuel mixture, resulting in increased pollutant emissions from the vehicle's exhaust. 4. Difficulty starting or even stalling: If the fuel injector is severely damaged, the vehicle may experience difficulty starting, or even sudden stalling during operation. 5. Engine misfire: If the fuel injector of a particular cylinder is severely damaged, the engine is highly likely to experience misfiring, leading to severe engine vibration. 6. Black smoke from the exhaust: With a damaged fuel injector, the atomization of fuel and its mixing with air cannot be ensured, preventing the complete combustion of the combustible mixture. This results in symptoms like black smoke from the exhaust and increased engine carbon deposits.
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