What are the reasons for sluggish acceleration when flooring the throttle?

1 Answers
GraceAnn
07/30/25 10:16am
Sluggish acceleration when pressing the throttle pedal could be caused by excessive engine oil, overly viscous engine oil, faulty sensors around the engine, or transmission system malfunctions. In vehicles, the engine generates power while the transmission system transfers this power to the wheels. If there's an issue with the transmission system, acceleration problems will occur when depressing the throttle. Below are relevant details: 1. Poor fuel quality: Using low-grade gasoline from unregulated gas stations may lead to incomplete combustion of the air-fuel mixture, triggering the engine warning light. While this doesn't immediately affect driving safety, it can potentially harm the engine. 2. Oxygen sensor failure: The front oxygen sensor monitors the air-fuel ratio under different engine conditions, with the ECU using this data to adjust fuel injection and ignition timing. The rear sensor primarily evaluates the catalytic converter's performance.
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