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Looks like they were running French fry oil. You wouldn't need a heated hose for bio diesel Sent from my iPhone using Tapatalk
first off, you need to plumb the CDR/PCV valve to the intake ahead of turbo, this creates the vacuum to work it, venting it like you have it now does nothing, and will actually remain closed if it is still working(which means excessive crankcase pressure and possible blowing of seals.)now what are the exact symptoms of the engine, take your time spell it out, be descriptive, and we should arrive at a solution much quicker.my first thought is an air leak-which if what you say you still have one, it is completely probable that is the cause of 90% of the symptoms. Next, I hate cobbled Bio systems, cause that means most people just through crap into the system and that clogs up everything, so running a mix of diesel and power-service from a 1 gallon jug, or even try Lubro-Moly Diesel Purge(big one for VW and Mercedes Diesel) will help clean the system very fast.