Your car sounds like it needs a tune up . You may need to replace the air and fuel filter . New plugs and wires as well , a new PCV valve will also help. If the engine is throwing any codes they should also be addressed . Do you have any MIL lights on on the dash ? If so get an OBDII reader and find out what systems are effected. Service your car and it will run well ignore the maintenance and it will run like crap . Hope this helps