Michael, welcome to our virtual garage and service center.
We offer remote evaluation and troubleshooting of air-cooled engines at very reasonable rates. We like to think that our advice is worth every penny you pay for it.
But it would help a lot if we knew more about your car and your history with it.
Is the car new to you? How long have you had it and how far have you driven it?
Has it always had these issues or did they just start? Does it drive well in warmer temperatures? When it’s first started?
What Stan says about tuning for a specific temperature range is true, but as your profile says you’re in San Diego, you certainly should be able to find a good compromise tune that will work well in any temperatures you’re likely to encounter.
Again, the more you can tell us about your driving experience with the car and the specifics of the problem, the more we can help.