1991 geo metro conv auto-trans gets 23mpg city or hwy whats the deal plugs burn great-no fouling car runs great but mpg is very low any ideas?

Answer 1

Have you done some of the maintenance? Check fuel filter. Air cleaner. Also have cad. convertor checked out. You can also have the fuel system cleaned. Has the check egine light every come on? Might just have it hooked up to the computer and see if anything comes up. Its worth the money to have it checked out. Also its in everybodies interest to get to be friends with a reliable mechanic for suggestions.I would also check compression on the cylinders and the oxygen sensor. You might have a bad sensor or a wire disconnected. When something like this happens, the emissions computer has to assume things and this will result in poor fuel economy.Hey man, Hows it run? will it go 80 mph on the open road? If not, do a tune up, cap ,rotor wires, plugs, also (very important) check the timing and readjust. Advance the timing if you can. I don't know why someone would tell you to check the fuel filter, this would only affect performance not milage so much. I dirty injector will affect both milage and performance. Buy the absolute best fuel injector cleaner you can. $20-$30 .does the car coast very well? If not may need an ailignment. Maybe a brake is hanging up. On level smooth ground you should be to push the car easily.