Engine refresh ?

[Jeanseb29]

I would try cleaning the MAF sensor and the throttle body. You can buy both cans of cleaner at Canadian Tire for less then 20$. After that, disconnect the battery for a couple of minutes to reset the ECU. Once the battery is reconnected, start the engine and let it idle for 10-15 minutes. Drive for a day or two and come back here to tell us if you noticed an improvement :) - JS

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[06YarisRS]

Originally Posted by Jeanseb29

I would try cleaning the MAF sensor and the throttle body. You can buy both cans of cleaner at Canadian Tire for less then 20$. After that, disconnect the battery for a couple of minutes to reset the ECU. Once the battery is reconnected, start the engine and let it idle for 10-15 minutes. Drive for a day or two and come back here to tell us if you noticed an improvement :) - JS

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Take this advice. These are very simple jobs and can make a world of difference. This simple service both smoothed out my idle and generally made the engine run better through all rpm ranges.