c blue Posted October 3, 2021 Share Posted October 3, 2021 idle great when cold until reaches operating temp then it starts to idle rough switch it off restart idle OK for a little then back to rough idle Quote Link to comment Share on other sites More sharing options...
Toyota Owners Club Posted October 25, 2021 Share Posted October 25, 2021 It could be a defective coolant temperature sensor which is giving the wrong reading through the temperature range. Also, could be ignition or fuel issues which are affected by temperature. Try running a scan for fault codes stored in the ECU Quote Link to comment Share on other sites More sharing options...
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