[Trackrash]

Originally Posted by bobspace

Thanks everyone for the feedback!

Another note: It's very cold and wet where I am, currently. I live in the bay area and in crossing the bridge, I was literally driving though clouds when this was happening.

My mechanic suspects water in the fuel or carburetor icing.

Has anybody had this kind of performance due to moisture?

No. Moisture can cause misfiring, but not what I think you are describing. Carb icing in the Bay area, I think not.

Once upon a time when driving in really damp conditions my car would have a random missfire. Turned out to be a crack in my rotor.

If it were me, the first thing I would do is put a timing light on it and verify the ignition.