so 1990 300zx NA....bought from old guy who didnt drive it for 2 years....cost was $2500...so i bought it....now i have prioblems. The car is running with hesitations and jolting back and forth...I changed both CATS since they were clogged, new alternator, new fuel filter and just today i got the fluids flushed...and still it hesitates and slowly just stops...it feels like their is not enough fuel going to the engine.....i'm still saving up for the 120k service that i need to do but until then i should atleast be able to drive it, but i cant...I ran out of things i need to do to make it work right....anybody out there know whats going on??? please help!!!!