Hi List, I have been wondering if I should be concerned about the mileage my car has been getting. I filled it up 5 times now and set the trip odometer and every time. I got about exactly 185 miles until the low fuel light came on. Once the light goes off and I put gas in it holds 10.5 gallons. So 185/10.5 is about 17.5MPG highway. I am not that hard on the car and drive highway most of the time. I never run the A/C and don't do any city driving. Mainly just to school and back which is straight shot 2 lane highway. The exhaust doesn't smell strong but I guess it still could be. The frequency valve is buzzing away but maybe not correctly. I would rather not take it to a shop if I can help it. Is there a way to test the 02 sensor pulse? The whole fuel system is new and I have not touched the air/mixture screw...yet. also, when I hit the full throttle micro switch shouldn't I hear a change with the frequency valve and a slight raise in RPMS? That is not happening. The car starts with barely turning the key even in the cold so I think the cold start valve is fine. Thanks David