What Causes the Malfunction Light to Illuminate, Lack of Power When Accelerating, and Inability to Gain Speed?

[SilasRose]

Poor quality gasoline that does not meet standards, faulty oxygen sensor, malfunctioning air flow sensor, carbon buildup on spark plugs, engine knocking, or engine misfiring. Related explanations: 1. Carbon buildup on spark plugs: Leads to poor engine performance, resulting in unstable idling, poor acceleration, increased fuel consumption, and other abnormal phenomena. 2. Air flow sensor: Detects the intake air and converts it into an electrical signal sent to the electronic control unit (ECU), allowing the ECU to determine how much fuel to inject. 3. Oxygen sensor: Since the purification capability of the three-way catalyst for CO, HC, and NOX sharply decreases once the air-fuel ratio deviates from the theoretical value, an oxygen sensor is installed in the exhaust pipe to detect the oxygen concentration in the exhaust and send feedback signals to the ECU. The ECU then adjusts the fuel injector's fuel injection volume accordingly, keeping the air-fuel ratio close to the theoretical value.