I let my car sit for 2 days and turn it on and it runs decent does not sputter much but after 5 min after being warmed up it sputters , so then I run it like that for a bit and go pump gas after pumping gas it takes another 10 min for the car to run right again , any ideas on what it could be ? It gets really annoying as I don’t drive the car everyday. It’s a sbe 306 with 24 lb , spray pattern injectors and a 255 lph fuel pump . Since it’s cammed it runs even worse with the sputtering.