Rough Idle Due to Cracked PCV Hose on Ford Expedition

Problem Description and Possible Solution

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

Problem Data
RepairPal Verified
Average mileage: 154,946 (110,230–218,000)
Engines affected: 4.6L V8, 5.4L V8
8 model years affected: 1997, 1998, 1999, 2000, more2001, 2002, 2003, 2004
28 people reported this problem
Viewing 1 - 9 of 9 comments
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.
slight missing at idle. getting code p0171 and 0174. pj177@sprint.blackberry.net
replaced entire pcv hose assy including valve
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
Egr valve was sticking. Replaced and fixed problem.
Replaced with Bulk Fuel Line and resolved issue
Was having problems with truck rough idling, then started to die. Took it to our mechanic said it was the main hose to the engine.
Pvc line busted. broke air leaking car goes death if you don't press the gas.
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.