Air/Fuel Mixture

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1995 Mazda Protege
I have a 95 Protege and was wondering if anyone knew the correct air/fuel mixture. I bought the car for 500 dollars because I liked the body style but after a close inspection adn 4500 dollars alter it is in tip top shape. All but the air/fuel mixture. Any help would be greatly appreciated.
 
Any mods done to it that will affect afr's? What are your afr readings now? Do you have a wideband in the car? Questions.......questions
 
I have a short ram intake on it and thats about it. I bought the car used and the people messed with the air/fuel mixture screw and its not been right since. And your gonna have to spell things out for me im not good with abreviations ex. afr's.
 
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