Sorry it has been so long since I have replied between being sick and working I haven't really had a lot of time to get on this. Since I have wrote last I have checked and replaced vacuum lines,fuel filter, front wheel bearings, map sensor, oxygen sensors, mass air flow sensor, and found the parking brake was rubbing. Nothing has even remotely changed the fuel mileage. Replacing the mass air flow sensor and oxygen sensors has taken care of the lean code that would show up every now and then but otherwise there is nothing the computer can see wrong.