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egrsensor 5.0 idle

  1. 5.0L Tech
    well right now on my 86 5.0 i dont have a egr sensor mine was all effin broke but im still doing good without it but i want to know thow if i get the 75mm egr sensor will it make more power and better gas mileage or what im kinda confused right now im not sure what it will do if i put it in like...