Hey everyone, just seeing if anyone has experienced the same issues.

The other day my trusty van started giving me problems. It starts up just fine.. however after I warm it up and put it into gear and accelerate... it starts sputtering (hiccupping almost). even when i take up to higher speeds it starts to delay as if there are lapses in the fuel getting to the motor, it does not have a smooth idle, whether in neutral or while driving. I changed the fuel filter thinking it was clogged/old. and have a fuel pump ready to install. just not sure what else the issue could be

Any thoughts? Thanks in advance