What Causes the Engine to Feel Sluggish and Fail to Accelerate When the Throttle is Pressed Hard?
1 Answers
When the car feels sluggish and fails to accelerate upon pressing the throttle, it may be due to excessive engine oil or overly viscous engine oil. Below is relevant information: Poor Fuel Quality: Shortly after refueling, the engine warning light on the dashboard illuminates. This is usually caused by filling up with low-quality gasoline at an unregulated gas station, leading to incomplete combustion of the air-fuel mixture during engine operation and triggering the engine warning light. While this does not affect driving safety, it can harm the engine to some extent. Oxygen Sensor Malfunction: Modern cars are equipped with two oxygen sensors, one before and one after the three-way catalytic converter. The front oxygen sensor detects the air-fuel ratio under different engine conditions, and the ECU adjusts fuel injection and calculates ignition timing based on this signal. The rear sensor primarily monitors the performance of the three-way catalytic converter. Therefore, if the oxygen sensor is damaged or its connector is loose or faulty, it can result in an overly lean or rich air-fuel mixture.