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Hey,

When my car revs high and the BOV lets the pressure loose, there is a small spray of some residue that comes out of it. From the looks of it, it looks like oil.

I have a tbko s/c kit with a hks BOV. Can you guys give me some input on this? Thanks...this only happens if its in high boost
 

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sounds like blow by. Try checking your compression. Or while your car is idling try taking out the breather or hose on the valve cover and see if its puffing out any smoke. Any smoke coming from the exhaust?
 
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