I have a 89 Dodge Ram 50 2.6 liter Weber carb conversion no catalytic converter or EGR valve electric fuel pump . i drive the truck every day back and forth to work the problem I am having is that one day when I drive it the truck runs like a champ and doesn't mean miss a beat the next day I drive it it will spit and sputter and sounds like it is backfiring does this sound like a fuel delivery problem