Lexus ES300 poor fuel mileage and sluggish acceleration due to running rich on Lexus ES300

Some Lexus ES300 owners report experiencing poor fuel mileage and sluggish acceleration due to running rich. This condition can manifest as decreased fuel efficiency and rough idling, often linked to common issues such as a clogged air filter, dirty mass air flow sensor, clogged fuel filter, or fuel pump problems. Additionally, symptoms of running rich may include engine performance issues, further impacting acceleration. To mitigate these issues, some owners find it beneficial to check and clean fuel injectors, engine valves, and combustion chamber deposits. Utilizing a fuel system cleaner, like Chevron Techron Concentrate Plus, may also help enhance fuel efficiency and acceleration. Regular maintenance and servicing are crucial for optimizing fuel performance and addressing these concerns effectively.