96 gt

cold star and hard acceleration has serious buck / hesitation

Do you let your car warm up before you take it out; say 8-10 minutes?

doesn't matter warm or cold but hard acc. it bucks not all the time though

Check out your throttle body the TPS sensor might not be adjusted properly leading to hesitation.When it bucks is it only on take off or when your in the middle of a gear?

in gear hard acc. push in clutch and rev. no problem

try be specific. you paraphrase everything...
for instance, i have no idea what this means
"in gear hard acc. push in clutch and rev. no problem"

driving in gear under hard acceleration thhen push in the clutch can rev the engine and no buck. its just under hard acceleration hot or cold don't matter and if you let it sit for acouple days its real bad