Slappy
Well-known member
Over the last couple of months my fuel economy has gone seriously down hill. Ive gone from 240 a tank to 150 a tank. I have had the valves checked, all within spec, I have new plugs, less than 1,000 miles on them. I use the same oil/weight and filter. I drive the same roads every day commuting at the same speeds both ways. Same tires at 42/40 pressure. I generally use the same gas from the same station. The air filter is less than a year old and seems to be in fair condition.
Could it be a bad or going bad O2 sensor or mass airflow sensor? What else can cause fuel economy to go this far south that quickly?
Could it be a bad or going bad O2 sensor or mass airflow sensor? What else can cause fuel economy to go this far south that quickly?