I live in Houston TX and it doesn't get to cold around here very often, but it seems that every time the a cool front comes along my car starts to hesitate on accelleration and run a little rough. It feels almost like a have a clogged fuel filter. As soon as it warms up again it runs perfectly.

Any tips on what to check out?

I could think of many different things that cause this. My question for you is what model of Z car do you have? Give us some idea about the car with the 5 W's please.

Oh sorry I forgot to mention it. Its a 1975 280z. Its pretty much all stock with the exception of a home made cold air intake.