2006 EXPEDITION 5.4 ENG PROBLEMS
 

ENGINE HAS TAPPING SOUND LIKE STUCK LIFTER AND HAS BAD MISS AND ROUGH IDLE . WHEN DRIVING SOUNDS LIKE ITS LABORING LIKE THE OLD DAYS WHEN U USED CHEAP GAS . I PULLED THE CODES AND HERS WHAT CAME UP PO172,PO174,PO300,PO303,PO304,PO304,PO420. HAS TO BE SOMETHING CAUSING THESE CODES ANY IDEAS ON WHERE TO START WITH THIS. THANKS IN ADVANCE