When the engine is cold and I start the car, after a minute or so I turn on the heater while idle and the revs go up for about 3000 rps?
Jan 17, 2010 at 12:00 PM
Engine revs and the heater is not working
2008 TOYOTA COROLLA
DDUTINA
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Hello,
This high RPM issue could be triggered by a faulty idle air control valve. On this vehicle the idle speed control is part of the throttle actuator.
https://www.2carpros.com/articles/engine-idles-too-high
It is a possibility that this is triggered due to having a dirty throttle actuator. When the component of the actuator gets dirty it is unable to send correct data to the ECM and that can lead to erratic idle.
Try servicing the throttle actuator by cleaning it out.
Here are couple of helpful articles:
https://www.2carpros.com/articles/how-a-throttle-body-works
https://www.2carpros.com/articles/throttle-actuator-service
I have attached diagrams for your reference.
Please let me know if you have any questions.
Thank you.
This high RPM issue could be triggered by a faulty idle air control valve. On this vehicle the idle speed control is part of the throttle actuator.
https://www.2carpros.com/articles/engine-idles-too-high
It is a possibility that this is triggered due to having a dirty throttle actuator. When the component of the actuator gets dirty it is unable to send correct data to the ECM and that can lead to erratic idle.
Try servicing the throttle actuator by cleaning it out.
Here are couple of helpful articles:
https://www.2carpros.com/articles/how-a-throttle-body-works
https://www.2carpros.com/articles/throttle-actuator-service
I have attached diagrams for your reference.
Please let me know if you have any questions.
Thank you.
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Oct 10, 2021 at 6:51 PM
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