Rough Idle Due to Cracked PCV Hose on Ford Expedition
Problem overview
The Ford Expedition is known for idling roughly, with a slight whistling noise from the engine compartment. After a short time, this may result in poor fuel mileage, and illumination of the check engine light.
This is caused by a cracked positive crankcase ventilation (PCV) valve hose, which allows a small vacuum leak, and improper evacuation of engine crankcase pressure.
Correction is simple, and requires replacement of the PCV hose. An updated part may be available.
44 people reported this problem
13 commentsFord Expedition vehicles with this problem
8 model years affected
Average mileage: 158,132 miles
(110,230 - 218,000)
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