Just getting used to my carbureted 1990 yj. She sputters bad when the heat or radio are on (worse in mornings or evenings when it’s slightly cooler). Original Carter carb w stepper motor. Not nuttered…yet although I did unplug stepper and adjust pins and it runs way better in normal circumstances. It does still stall out a lot. Planning on nutterimg and also maybe getting a motorcraft 2150. Any thoughts?