What are the symptoms of a faulty throttle body?

[DallasLynn]

Signs of a faulty throttle body mainly include: 1. Unstable engine idle speed, persistently high idle speed that doesn't drop, difficulty in engine starting, especially cold starting difficulty; 2. Unstable engine idle speed or no idle speed; 3. Difficulty in engine starting; 4. Insufficient engine power, poor acceleration performance, unstable operation; 5. Black smoke from the car's exhaust pipe and increased fuel consumption. Extended content: Use a fault diagnostic tool to perform throttle body inspection and observe data flow. If the throttle opening is too large, cleaning is necessary; if the throttle body fault is confirmed to be permanent, replacement is mandatory. Throttle bodies are generally not repairable through disassembly and can only be replaced as an assembly.