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I have a 1999 expedition 5.4 the same motor as the 98 . you will need metric socket's 1/4 " drive and a 3/8 " drive with a deep 10 mil. socket . also a large adjustable wrench and a pipe to fit over the adjustable ( as a breaker bar ) take off the throttle body cover , disconnect the EGR pressure switch , (I HADE TO REPLACE THE PRESSURE SWITCH ALSO ) there are two nuts holding that on , remove , there is one bolt on top holding the black bracket on , remove . Take the adjustable wrench and undo the large nut on the EGR valve , this is where the deep socket comes in undo the two remaining bolts and remove the EGR valve , clean the surface very good . Use throttle body cleaner and clean the inside good . seal gasket and repeat . I hade the check engine code reset , and my gass mileage inproved .
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∙ 8y ago
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