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My car does something strange after a few minutes of idling. The engine revs itself up and then down repeatedly. No one I have talked to knows what this could be. Can you help?

Answers from the Automotive Experts

Amanda J. Pierce, MBA Misti, There are a number of sensors that fall in line with your malfunction description. You can have a diagnostic scan tool hooked up to the main computer to read what sensor is acting "abnormal" to create this drivability concern. AJ Pierce

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