sounds like a fuel problem change the fuel filter first
Your alternator is not recharging the battery and is defective.
Example sentence - The dead battery in the truck had to be replaced.
If it is running on the battery only then that means the alternator is not charging the battery.
As long as the alternator works and your charging system is correct, the new battery will start your truck and keep it running.
altinater is probobly dead
bad alternator ? its not charging the battery
Try the cables from your battery and alt. Sometimes these can corrode.
Buy a new battery: that's a bad sign. just keep running it
It could be anything from the engine to the connectors
If the donor vehicle is running and has a properly functioning alternator, no.
have the alternator tested or replaced
check the ECT sensor with a scan tool