my 84 300z runs pretty bad when it is cold but after it warms up it goes great. there is a little hesatation untill the turbo kicks in. do you think that it is just old or is there something that i can do to pick her up again. i just changed the distribeter cap and rotor and the fuel filter but that didnt make much of a difference. the k/n air filter looks new and i repalced the vacuume hoses well most of them.