Gas Mileage dropped

[Eaglefixer]

after i changed my o2 sensor and cleaned my Map sensor. Dropped about 30miles per tank of gas. I have new plugs and wires, fuel filter, air filter and new clutch. I can feel a miss a idle but runs find and no check engine light.
__________________
Steve

1996 Ranger 4.0 V6 2wd 5-Speed

 

[kimcrwbr1]

Did you reset the computer. Disconnect the battery for 1/2 an hour then run it at medium speeds for another 20 minutes. You need to do that every time you change or clean a sensor so the computer can set new values.

 

[nitrofan1]

Did you clean the Mass Air Pressure Sensor or the Mass Airflow Sensor? The MAF is in the air tune right out of the filter box. If you did clean it did you use mass air flow sensor cleaner? If you cleaned that and used carb or brake spray cleaner it will leave a residue and the sensor will miss read.

 

[kimcrwbr1]

Do you have a MAF sensor if so clean it too and what did you clean the MAP with any harsh chemicals will mess it up the same with the MAF.

 

[Eaglefixer]

i did clean my mass air flow sensor with the Maf cleaner but i never reset my computer

 

[kimcrwbr1]

Yea your running on old values the computer don`t go backwards.