1995 Chevy Cavalier Engine not idling properly and wants to

I have a 95 Chevy Cavalier and when i start the car i dosen't want to start with out pressing on the gas and when i drive the car it wants to die and when the idle starts messing up my temp gauge starts to jump all over the place i've replace the map sensor and cleaned the egr valve i'm at a dead end and need help thanks.