probably lost the oil there.... pvc can be filled with oil too.... try to disconet it to see if oil coming out... should be just air that goes there !!! 
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Crazy !
Sentra Sport Coupe 87 Turbo
14.850@97.454mph
H&R Spring, 15psi, TMIC, 370cc, Nismo mount and pulley, Almasi tuned ecu...
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