when I start my car up and it warms up it sputters and dies when I push on the gas, even if I just push a little bit. I can start it back up and it will idle fine. The car has been switched from fuel injected to carburetor. I put seafoam in it. I ran all that out. I don't know if the carburetor is adjusted right. I know the fuel pump is working like its supposed to. It used to do it occasionally and then run fine but it does it every time i drive it now. I need some suggestions on what it could be. My mechanic cant figure out what it is. We need some help. Ive been dealing with this for about 2 weeks.