Can someone advise me on how I can clear up code 34 - Vacuum Sensor/Map Hose and code 45 - O2 Sensor Rich from my 82 Coupe Deville. The car seems to ride sluggish on the highway when I give it gas and acts like it is misfiring. It takes a bit to warm up too in the morning. I have noticed that it is running much richer than before. Driving in the local streets does seem to be normal but when I hit the gas to take off it hesitates. I have already changed the spark plugs and wires.
Thanks for your help.

check to see if you have any disconnected vacuum lines and relplace the o2 sensor, then clear the codes and you should be good to go.

Where can I find that o2 Sensor? Is this a dealer item I need to purchase or can I get the sensor and change it myself from the local auto parts?

Where can I find that o2 Sensor? Is this a dealer item I need to purchase or can I get the sensor and change it myself from the local auto parts?

Do it your self in 10 min. I got an o2 sensor for my 89 deVille for $25 and anti-seze for $1, from my local Auto Zone.