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Discussion Starter · #1 ·
About a week ago I started to experience intermittent rough idling for 20-30 seconds then it would go back to normal. After a couple days of this I got a Check Engine Light and then it started dying when I would be coming to a stop. It won't die when it has just been cold started, but once it has warmed up it will die almost every time I come to a stop. I can keep it running by putting it in neutral and keeping the engine revved a little while I am stopped. I read the code and it came up P0171. I've checked and I can't find any obviously damaged vacuum hoses. I even looked underneath and found what I believe is the hose to the PCV Valve and that seems to be in fine shape. At this point I'm thinking I'll probably have to get it into a shop, but I wanted to ask if there is any more easy things to check beforehand.
 

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Discussion Starter · #3 ·
Ah, I had looked at some other threads and pictures and thought I knew where to look. That second link lets me know that I was not looking at the right thing. I guess it is to the shop for it then.

So annoying, I had the exact same thing happen with my 2000 Escort but that was a super easy fix because the PCV was up on top right out in the open.
 

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Yes, the Duratec PCV valve is covered by the intake manifold. To access it you have to pull the radiator fans and the intake. Then, when you have the car completely out of service, there's a plastic snap ring over the PCV valve that you're probably going to break. I had a hell of a time with this repair.

Toby
 

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Call me the conspiracy buff if you will but I keep saying much of this is for a reason. The cars are living so long now they have to create new revenue streams by making parts that now break at any working on them and break easier without even touching them. Once the engineers have done the ultimate job they then turn them inward to design parts that last only so long before they fold up, you can tell it easily if you've looked at parts forever. The cars simply last too long now if you stay on top of them, they frazzle you down now by making little things break that irritate you more and more until you give up to buy new car. If you are willing to chase the small breakages the cars last 300K now.
 

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Same symptoms my '06 is having, only it's not shutting off.........yet.
Guess it's time for a pcv valve change. Been putting it off long enough. Surprised it lasted this long, but the Ford dealer said don't worry about it till the idle gets rough. 257k miles is long enough, eh?
 

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PCV valves if metal virtually NEVER go bad, they just clog and easy to unclog. The quick fix is to change it but then you always have to wonder did new maker of valve use the correct size metering orifice in it? They have a tendency to condense parts and why I always use the same OEM one over after cleaning. Haven't changed a valve since the '70s..................
 
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