97 Jimmy hesitates still

I posted a thread about a week and a half ago about this problem.Thanks Blazer LT for replying..Checked the fuel pressure it was good 63 psi with engine off key on..Engine on it was 60 psi..The vehicle still hesitates when you accelerate slowly..If you floor it,the vehicle doesn't hesitate..It doesn't hesitate as bad when the vehicle is warmed up...Any suggestions? Thank you in advanced for your replies..