jiggly

97 5.4 L Triton ford expedition. rough idle and spiting out codes
PO171 & PO1714 ,spent the last 4 days diagnosing the problem, PVC valve assembly was melted behind the throttle body causing rough idle and multiple misfires, Auto zone had me buying " all 4 -02 sensors ,EGR Valve , MAFS ,vacuum hoses , spark plugs , professional fuel injector cleaning , gas filter. needless to say, after buying all this, none of the above was the problem, it was the PCV VALVE assembly. it was the week from hell !!


thanks for your reply.