If I try to start the truck it will start to turn over then normally I give it a half pump of gas and we’re good but lately once I get off the starter it won’t run. Any ideas? Also before this was happening it would run well until it got to ot then die. I asked a friend and he said it was probably a float stuck in the carb and it’s so cold out I haven’t gotten to working on that. Would that be responsible for this?