Fuel System Issue? Check Density Altitude

The mixture seems either too rich or too lean during climbout. Is there a fuel metering problem or is it a normal variation with density altitude?

It starts innocently enough—in your fixed-pitch prop single, climbing out on a warm, but not hot, summer day, the VSI points to a number even lower than the usual lethargic rate. Or, on a cold morning the engine monitor on your Bonanza is showing higher than normal CHTs. Have you got a problem up front […]
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