96 olds cuttlass 200k acting funny when starting, very sparatic. does it more when it's warm acting like it is flooding when trying to start. had my mechanic check it out and can't find a thing wrong with it. he replaced the fuel pump about 3 months ago. he said the bump is working fine. i'm kinda thinking he replace the pump when it was probably working fine. $350 later could it be my fuel pressure regulator? he said he checked it and it looked fine but you never know? does anyone have any idea what the problem is?