Starting Issue on 4.0
I have a 2008 fx4 4.0L that has developed an issue starting. It starts perfectly when cold. It sometimes does not start when im away from the vehicle for an hour or so, after driving it. It will crank, but crank weakly and won't start. If I jump it, it starts right away. I don't think it's the battery because it starts right away when cold. Starter motor need replacing? bad plugs? Any advice is appreciated.