[jamesm]

i've been working on getting my pcv system fixed up lately, first fixing a problem with the pcv leaking under boost and now trying to eliminate a vacuum leak.

the problem is that there is nowhere to run the crankcase breather to (the line that would normally run to the intake, not the pcv line running to the intake manifold). with a blowthrough maf, if i place the line before the turbo in the intake tract it's going to be pulling vacuum, but it'll also be pulling in unmetered air at idle/low load. i can't place it after the maf because that would be after the turbo, and would see boost.

my current plan is to just cap the intake manifold and run both the pcv and crankcase breather to a vented catch can. that way there is unmetered air in the crankcase, but at least it has no path back into the intake manifold. of course this produces little to no crankcase vacuum which kind of takes the 'positive' out of 'positive crankcase ventilation', but it seems like the best i can do.

how is everyone else handling this with a blow-through maf?