Oil In Intake Plenum

[EOLIVER]

I installed an Air foil in my 1987 coupe (L98) and when I removed the throttle body cover plate I noticed it was visibly wet from oil. A further examination of the area behind the are behing the butterfly area revealed carbon build up on the rear and oil within the plenum area. I have replaced the PCV valve once already. How much if any oil is normal and are there bigger PCV valves to be purchased for my car?

 

[rrubel]

What makes you think it's coming from the PCV valve? There's a breather hose on the passenger side that runs from the top of the valve cover to the throttle body. I get noticeable amounts of oil sucked up through that...
[RICHR]

 

[WNH]

I removed my TB & plenum for cleaning, after 115K miles. There was plenty of carbon build-up, but no trace of oil.
I guess your oil has to be coming from the breather or PCV valve.