In 28 years of ownership I have never had a cel. Am getting 12 MPH. Always paid attention to plugs, cap, rotor, and all fluids. Recently changed EGR valve & sensor, (Bellows ruptured) checked reference voltage at MAP sensor and EGO sensor, reads about 5 volts. New TPS in 1993. Ford/Mercury Dealers won't talk to me. I need additional suggestions. Are there checks for an AOD transmission? 5.0 Liter. CFI
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Thursday, August 29th, 2013 AT 1:58 PM