I want to know if the carburator with this engine is fuel injected, and what fuel pump I need for it??

 

If you have a 3.1 L V6 then you do not have a carburetor you have a multi-port fuel injection system which has fuel injectors and a computer among other things controlling the fueling. If you're talking about what replacement fuel pump you need you can cross-reference it at a AutoZone or place like that, or you could even put in a walbro 255 liter per hour pump which is a drop-in replacement when you get s wotong harness with the kit. It's a higher volume pump and works very well