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Q: Engine revving and surging.

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Engine revving while in neutral and the car surges when in drive without me even having my foot on the gas.

It sounds like you may be having a problem with your idle air control valve. This valve regulates the speed of the engine at idle. If it is malfunctioning or stuck you can have a high idle or surging sensation when in gear. I would ask for help from a certified mechanic, possibly from YourMechanic, to diagnose your problem and find the root cause.

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