You don't answer the question we ask with any detail. If you want help answer the questions. So you have PSSs, what is the tread depth left on them and how old are they? When you say cold, what is cold? I live in AZ and if it is 70 or below it's cold to most here in the state. You need to drive around for at least 20 minutes at highway speed 60 mph or more. Anything more than 34 psi is too much.
How is your alignment? Does it want to pull one way or another at 60 mph? Can you let go of the wheel at 60 mph and the car will go in a straight line? If you have done all of these things then the car is fine....park it and buy a Miata until you learn how to drive and control a tail happy vehicle.
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