Failed smog - 1983 Buick LeSabre

Back off the fuel mixture and clean out any breathers and air filters also check that the choke is not stuck. If its burning oil you have 3 choices 1. fit new engine 2. get the old one rebuilt 3. Try using very thick oil (wont help starting in cold weather but might just stop it long enough to pass) also get tested when engine is not so hot (oil thins down and burns quicker in hot engine) The right way is to get it fixed and I don't condone any other methods of using thick oil or removing the air cleaner element to cheat the test. Hope I have helped you in a small way.