Mike8734

New to maximas .. love my car .I'm in Oregon. I bought the car fot 400 bucks ,The spark plug tube seals were bad so I replaced the valve covers myself . Car ran good before.. excellent afterwards for about 20 minutes. Then it just died . No sputtering no warning just died . I put everything back the way it was ( I thought ) after it died I notice d that the sensor at the end of the valve cover was unhooked .the thermostat Guage no longer worked and now the key won't Eben turn . I've had nothing but problems with it I don't know even where to begin . Someone took the cat conv off and all the warning lights are always on ... any advice would be great . I looked on YouTube and tried to find what I could do about the ignittion lock cylinder but am unsure if it's the cylinder or the faulty steering wheel lock or what . It's a 2007 Nissan maxima sl with 215k on it .