Bad Gas Mileage And Sensors?

I Am Having The Following Problem...



I Have A 1991 Chevy S-10 Pickup, 2.8 V6, 2WD, Manual Transmission. I Am Really Getting Bad gas Mileage 7MPG. I Put A New O2 Sensor, Fuel Filter, Thermostat, Spark Plugs/Wires, Air Filter, And I Believe Thats It. I Would Like Any Info Why I Am Having This Problem. And I Would Also Like Maybe A Picture Or In Detail How To Change The Following Sensors/ETC.



1.) Mass Air Flow Sensor (MAF)

2.) Engine Control Temperature Sensor (ECT)

3.) Manifold Air Pressure Sensor (MAP)

4.) EGR Valve/Sensor



Now I Am Not Sure But Is The EGR Sensor Or The Valve The Same Or What. Or Any Of The Other Sensors.



THANKS

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Eric RitterBad Gas Mileage And Sensors?
guessing on what your problem is is going to cost you more than taking it to a shop to have it properly diagnosed i dont beliecve these sensors are causing your problem well possibly the mass air flow but thats an expensive part just to replace because your not sure take it too a shop. If these sensors were badthe car would run really bad and you should have a check engine light onBad Gas Mileage And Sensors?
I would suggest have the injectors cleaned. You can go to most shops like jiffy lube to have them do a fuel systems cleaning on it for about $40 or so. I works great. In my s10 that I had i was getting about 9 on a good day, and once I got the fuel systems cleaner, I got about 17Bad Gas Mileage And Sensors?
heres something you can do,that might help.clean out the throttle body.what about the air filter.a dirty air filter can rob you from getting good gas milage.