1998 Lincoln Navigator Q&A

1998 Lincoln Navigator Question: est. on tune up & replacing both upstream 02 sensors.also a massive vac leak???

massive vac leak @ rubber elbows or hoses goin to PCV valve? how much trouble,time,and money am i looking at? plugs,boots,coils for a tune up and labor cant be cheap or can it? please help, need my truck running as good as it can be!! -
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