anyone recomend descent leakdown tester?

ok i just started it up and let it idle to normal tempature, then i pulled the pcv hose off the base of my carburetor and put my finger over the hole, there was defanatly vaccum sucking against my finger and my idle dropped a little lower then what it normally idles at with the pcv hose connected at the base of the carburetor. So since my idle speed dropped does that mean i have an issue somewhre?