I blocked off my EGR a few weeks ago and now I have my FCV making a pretty horrendous buzzing sound while the engine is running and for about 10 seconds after shutdown. I suspect the little gears in the actuator have bit it. It was sticking in the open position earlier in the summer and was sticking this past week. It started the buzzing this past Friday.

Can I simply unplug it? ...or will it default to a closed position?

Our search feature on this forum is apparently defaulting to "OR" logic and doesn't appear to recognize "AND" logic anymore which makes it very difficult to conjure up past threads on any particular topic.

The valve is spring loaded to the open position. Unplug it and it should be open. Most seem to fail open. One member did report a closed failure, but the engine wouldn't run or smoked something awful. Pull the hose to check beyond a doubt if you are concerned.

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Matt B.

05 Limited CRD. Bought it new. 112k on the clock now.

GDE Eco-tune, rear differential drain plug (drilled and tapped the pumpkin), transmission pan drain plug, Fumoto oil valve, fuel filler neck restriction removed, front hitch, Hayden fan clutch, Sears P1 battery since 08, Mobil 1 5w40, 5 volt glow plugs, DIY timing belt at 109k

Thanks for the reply. I didn't want to unplug it and have default to closed. Outside of the buzzing, it's been running fine. I don't even get "smoke" on hard acceleration anymore...amazing how much crap an EGR valve dumps in an engine. The shutdowns are a bit harsh, but not bad...could be the winter diesel. During the summer, shutdowns were pretty rough and the engine would shake for a second or more.

Nope, thats the FCV causing the rough shutdowns, when its working correctly it will make those smoother, otherwise that last little shake is just kinda rough.

Mine's been this way for 40k miles now, you can just leave it and itll be fine.

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http://www.Colorado4Wheel.com
"Its not about what you can DO with your Jeep, its about where you can GO with your Jeep."
Knowledgeable - But Caustic

If you disconnect it the CEL comes on.

You are right about what's wrong with it, the plastic gears break pretty easy.

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Cherokee 2,5 CRD: sold - Wrangler TJ 2.5: gone - Touareg V10 TDI: new toy

Solo Liberty en Español: Jeepliberty.es

Yes, but the buzzing stops. Plus my CEL is on anyway from an unplugged MAF.

_________________
http://www.Colorado4Wheel.com
"Its not about what you can DO with your Jeep, its about where you can GO with your Jeep."
Knowledgeable - But Caustic