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everyone know the crankcase breather hose ? the hard plastic hose that runs from the back of the valve cover to the intake ? i was bored today and just cleaning out my car, detailed under the engine bay, vacuumed and what not...and i decided to take my intake off and clean the throtle body...and i said to myself, that breather hose that lets blow by gasses out of the crankcase must get sludgy and dirty. my car is an 07 and this is the first time ive done this, i disconnected the breather hose on both ends and took it off...i took a rubber fuel line hose and stuck it on one end of the breather hose, and blew air through it very fast...so much gunky sludge came out of it...i figured maybe it could be gettin clogged up...i then poured seafoam into it and blew it out through the other end...holy jesus that hose was spitting so much gunk and oil sludge..i repeated several times until it was fully clean..i wiped everything off and reinstalled onto the intake...the hose gets really dirty man. my car has been running very smooth, however after this its running even SMOOTHER that i didnt even know it could have. check yours out