Hi, I'd like to check my PCV hoses for vacuum to see how much suction is created by the intake manifold. I thought about simply running the engine at idle and disconnecting the pcv hose from the intake duct and putting my finger to sense vacuum force. I guess this would work but by disconnecting the PCV hose I open the circuit and hence blowby gases are no more sucked out of the crankcase. Of course I don't plan to do that for a long time but do you think it may hurt anything? Any other way to check how much vacuum is in the PCV hose (without a gauge)?