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Q: Car runs rough in rain or humidity

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My car runs rough, especially when it's raining or humid.

A: If your car is running rough under wet or h...

If your car is running rough under wet or humid conditions, this may be indicative of a problem with the vehicle’s mass airflow sensor, or perhaps one or more of the ignition coils. As these problems are electrical in nature, I would recommend having the vehicle’s electrical system inspected by a professional technician, such as one from YourMechanic, to determine the exact nature of the problem.

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