The car is a 85 12A street port with 35k on the rebuild. It sat for about a month, I go to drive it and it had absolutely no power at all. I change the plugs and that helped tremendously, but still not right. Also filled the tank with 93. The car stutters before the boost kicks in (from the port not a turbo ), then when it does kick in its still not like it was before I parked it. Its also not backfiring very often.

Any ideas?

Im in upstate NY where is been in the negative for most of the winter, if that matters at all.

 

The past few days was about 40-50*F and I drove the car those days, acted normal. Could have been old gas + cold carburetor + old plugs = not happy rotary?