A bad fuel injector can significantly impact the performance, efficiency, and longevity of an internal combustion engine. Here are the main effects of a faulty or malfunctioning fuel injector: --- ### 1. **Engine Misfires** A bad injector may deliver too little or too much fuel, or none at all, to one or more cylinders. This imbalance causes the engine to misfire, resulting in rough idling, hesitation, or jerking during acceleration. ### 2. **Poor Fuel Economy** If the injector leaks or delivers

your mechanic on Instagram: "The clear explanation of the fuel injector spray patterns shown in the image: 1. Blocked Injector Spray Pattern: Very weak or uneven mist. Cause: Dirt, carbon deposits, or clogged internal filter. Effects on Engine: Hard starting Misfires Rough idle Low power Poor fuel economy 2. Poor Spray Pattern Spray Pattern: Thin or uneven cone of fuel. Cause: Partial blockage, worn nozzle, low fuel pressure. Effects on Engine: Reduced acceleration Hesitation during throttle Hig