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2nd Gen Ram Tech1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
if it has been leaking a while then you can just look at the underside of the butterflies. covered in thick nasty? replace plenum gasket.
That's only if it's a bad leak. I used to look in mine whenever I changed the air cleaner and it was clean as a whistle. Until one day I took off the TB for some reason(I forget) and looked with a mirror and light. And sure enough I had a nice large puddle of clean Mobil1 in the corner. LOL And it wasn't from the PCV valve.