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So last night car was idling rough. Andrei took me step by step on how to diagnose the problem. Took the valve cover off and it had a hissing noise coming from it. Put my finger over it and it helped and the car was running better. As a temporary fix I put a piece of duct tape over it so I can get it to the dealership. Well that didn't last long. Car started to smoke really bad. Could it still be the pcv valve?
 

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I don't think you're supposed to cover the hole permanently like that. You should be able to get to the dealership with it hissing...unless you're dealership is 100 miles away. I drove mine like that 5 miles home at night and 10 miles to the dealership the next day and didn't notice any performance issues.
 

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If it is the PCV, which it certainly sounds like it could be, then you want it fixed quickly (for your own safety).

If warranty is up, part (valve cover?) is $67 from dealer and easy to replace with a 8.5mm torx socket, and one additional socket for coil pack.

Took all of 1 hour to perform work.
 

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The PCV valve is covered under the power train 5 year/100,000 mile warranty.
 

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2012 ECO MT - Black Granite/Cloth; 814 mile range; Bluetooth Stereo AUX; OEM Fogs w/Chrome Covers; GM Spare tire; VG Shark Fin
2010 Mit Lancer GT MT (traded for ECO @31K miles)
2002 Pont Montana AWD (traded for 2012 LS @182K miles)
1990 Pont Transport (traded for Montana @240K miles)
1986 Fiero GT MT (traded for Transport - needed more seats)
1985 Fiero 2M4 MT (traded for Fiero GT @8K miles)
obermb, I am ashamed of the volume of vehicles I have owned, as my primary, in the last 26 years :-o

Edit: I will start a new thread..
 

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The vent is there as a failsafe for when the disc ruptures and the car is unable to vent PCV system pressure through the valve cover/turbo intake hose. Blocking off the PCV valve forces the crankcase pressure out elsewhere when the turbo spools up.
 
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