3.0 v6. need some help with this. been having hard starts, stalling when coming to a stop, and rough surging idle.

ive changed the spark plugs, spark plug wires, air filter, fuel filter, and fuel pump, and it’s done nothing. i believe this may be my problem, its a vacuum hose, i know i need new hoses, but im not sure how to route the hoses or what parts i need to replace.