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Discussion Starter #1 (Edited)
Hi

I serviced my Pug a few days ago. 2001 406 2.016v.
I noticed some oil in each Spark plug tube.
Also a small oil leak from top right of valve cover.
Also when removing the the oil filler cap with the engine running I notice there is quite a bit of
air blowing out of the filler hole.

The car does not use much oil at all. I about put 1x pint in between every 20k km's service.
No smoke or anything else to lead me to believe there is anything wrong mechanically.
I do think the CAT might be clogged. (occasional rotten egg smell)

There is at times a slight misfire when its cold but goes away after a minute or so.
1x error code P0350 (misfire)
I have checked the Breather hose and it seems to be clear.

Any ideas?

Thanking in advance!
 

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My idea is that it all sounds normal its old they tend to leak a little into plug holes only thing i would fix is missfire as left unchecked it will indeed damage the cat this MIGHT be caused by the oil in the plug holes but probably not could just as easily be caused by fueling
 

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Discussion Starter #3
Ok thanks reliable406!

Where would you recommend looking for the misfire problem
as there are no error codes besides the P0350?
 
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