1990 Mazda Miata MX-5 Q&A

1990 Mazda Miata MX-5 Question: Why does engine rev high on its own when air conditioner is on?

This happens every time I turn on the air with the fan on. The car has over 168,000 miles. Please help because it is extremley hot here, 120 degs. in Lake Havasu, Az. -
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