im having issues with my eclipse its a 94 1.8 sohc. and when the car is at idle it idles fine for about 5 or 6 mins then drops down to around 600 to 500rpms and begins running really ruff. Then when you accelerate. and stop again it does the same thing also other times it will just die out while driving. I checked all the vacuum lines and thought it might be one of those. But it doesnt look like any of them are disconnected. I was talking it over with one of my friends and he said it could just need a new cap and rotor,and maybe a new set of plugs and wires as well. could it just need a tune up?? or could it be somthing more serious

o the car is an auto with over drive and has around 145k on the motor