Car Problem Reports

Ford Expedition Rough Idle Due to Cracked PCV Hose

Ford Expedition Problem
19 Reports
Me Too

Model Years Affected: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004

Engines Affected: 4.6L V8, 5.4L V8

Average Mileage: 149,002 mi (122,100 mi - 208,000 mi)


The PCV hose may crack, causing the vehicle to idle roughly, this may or may not illuminate the Check Engine Light.

  • Visitor, , 5.4L V8, 136,000 mi

    Rough idle, stalling on my 2000Expedition. Code came up as PO171. Found a leak in my PCV hose at bend. This is a Ford only part. Went to local Ford dealer and ordered the hose with the PCV valve included. Replaced it myself. Problem solved.Ford part # 2L1Z6758GA.

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  • Visitor, , 5.4L V8, 122,400 mi

    replaced entire pcv hose assy including valve

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  • Visitor, , 4.6L V8, 208,000 mi

    idled roughly, would die after idling for a few minutes, but when going down road would drive fine. pcv hose broken and was replaced, fixed problem

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  • urlwilliams, , 5.4L V8, 193,000 mi

    Replaced with Bulk Fuel Line and resolved issue

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  • Visitor, , 5.4L V8, 130,340 mi

    Pvc line busted. broke air leaking car goes death if you don't press the gas.

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  • Visitor, , 5.4L V8, 155,982 mi

    I had extremely rough idle and most of the time it would not idle. I replaced the PCV plastic line with rubber hose. It has fixed the problem.

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  • Pdj, , 5.4L V8, 144,000 mi

    slight missing at idle. getting code p0171 and 0174.

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