What to Do When the Engine Fuel Injector Fails?

[GrahamLee]

If the fuel injector is faulty, the injector should be removed for repair. If the damage is severe, it should be replaced. After replacement, the injection pressure should be adjusted to 22-0.5Pa, ensuring good spray performance without dripping. Regularly clean the fuel filter to prevent excessive impurities in the fuel from clogging the injector. A faulty fuel injector can directly cause abnormal engine performance. Symptoms of failure include: (1) Black smoke from the exhaust pipe; (2) Uneven operation of each cylinder, causing noticeable engine vibration; (3) Decreased engine power; (4) Weak vehicle performance. To diagnose a faulty engine injector, let the engine idle and perform a fuel cut-off test on each cylinder sequentially. When the fuel supply to a particular cylinder is stopped, observe the engine's operation and sound. If the exhaust stops emitting black smoke and the engine speed changes after the fuel cut-off, it indicates a faulty injector in that cylinder. Once the engine injector fault is accurately diagnosed, remove the injector and test it on an injector calibration bench.