What are the symptoms of a faulty fuel injector?
2 Answers
Fuel injector failure can directly cause abnormal phenomena in the engine. The symptoms of a faulty engine fuel injector include: 1. Black smoke from the exhaust pipe. 2. Uneven operation among cylinders, with noticeable engine vibration. 3. Decrease in engine power. 4. The vehicle lacks driving force. Additional information: To diagnose a faulty fuel injector, let the engine idle and perform a fuel cut-off test on each cylinder one by one. When the fuel injector of a specific cylinder stops supplying fuel, observe the engine's operation and sound. If the exhaust no longer emits black smoke after the fuel cut-off and the engine speed changes, it indicates a faulty fuel injector in that cylinder. Once the faulty fuel injector is accurately identified, remove it and test it on a fuel injector calibration bench.
When I was driving my old car before, the fuel injector breaking down was a real hassle. Starting the engine was particularly difficult—I had to turn the key several times before it would fire up, and cold starts were especially troublesome. While driving, the idle was unstable, and the engine shook like it was dancing disco; when accelerating, pressing the gas pedal had no response, and the speed wouldn’t go up, making overtaking a challenge. Fuel consumption was noticeably higher than usual—a full tank lasted dozens of kilometers less. Even more annoying was when the engine would suddenly stall at red lights, which was downright embarrassing. Later, the check engine light came on, so I rushed to the shop for an inspection. The mechanic said the fuel injector was clogged and leaking, causing inaccurate fuel spraying. After replacing it, the car ran smoothly again. Everyone should pay attention to these signs—don’t wait until something breaks to fix it. Regular maintenance and using fuel system cleaners can help prevent such issues.
