engine loses power and wants to overheat

You have to diagnose the misfire and overheating. The misfire could be caused by a faulty sparkplug or wire to it, a faulty fuel injector or intake air leak or faulty EGR valve.. Overheating could have several causes including a plugged radiator, faulty water pump or thermostat, Incorrect ignition timing or restricted exhaust. If you want to find a Olds specialist, here's our directory link for you: https://repairpal.com/oldsmobile-repair-in-romney-west-virginia