My expedition keeps dying on me the battery dies once i get it started though it works fine its when i leave it parked over night there is a new alternator on it cause the old one went out and the battery is less then a year old

There is a problem in the electrics of the vehicle. First place to start is to check the alternator drive belt for condition and tension. Next place is the battery terminals and condition and tension . Third place is to have a load test done on the battery as it may have an internal short and drawing all the current from the alternator. In effect when you add power requirements ( park lights then brake lights then headlights) you are actually using more current than the alternator can supply to keep the engine system running.

This is a devious problem which could lie anywhere. So many things not functioning would perhaps be a ground problem. Maybe take some extra care in cleaning the battery terminals, check if the ground wire is connected to the chassis. Do you have rodents in your area? Maybe they nibbled some wire somewhere?

There is an electrical short draining the battery. . You can check each fuse one at a time to find the circuit & trace the wire to find the short. Make sure all electrical things are working, if u find something not working you can strt looking through that circuit for the short

Take it in to have a charge system check done on it, Your alternator is probally shot,

Batteries sometimes die completely for no apparent reason even though they were working fine only hours beforehand. Try another / new battery and get the alternator fuse checked, because it should not be obviously split, and replaced if necessary because with the fuse out, the battery will not be recharged. The alternator charging rate appears to be OK but have it checked anyway.

It sounds like there is a problem with the Idle Air Control (IAC) valve. Its job is to open and let air into the manifold when the throttle is closed at idle. If it does not open, the engine dies at idle. The IAC is mounted on the throttle body. Possibly the valve is clogged or stuck, in which case it could be ok again if it is removed and cleaned. Or it is broken, and needs to be replaced. Or, there is a problem with its electrical connection, that needs to be traced. Good luck, let me know if you have any questions.

you have more than one filter. check all fuel lines make sure no crimps.

Take in your car to an auto parts store and have the battery tested....and, the alternator.

I just posted my experience in another place on this site but on my 1992 PA the accessories relay stuck closed. This relay is the one that allows you to listen to the radio etc and keep things on until you open the door then all shuts off. When it is stuck closed accessories keep running until your battery drains dead. The relay was replaced and all worked great.

you could try to clean the mass air flow sensor