You got some great answers, hope i can add to it. Take EVOD off the batery, THEY blow through mouthpiece holding a rag under the EVOD, and any excess liquid will come out. Remember, a vacuum is SUPPOSED to build up pretty quicly on top of fluid if all is sealed. That makes drawing more difficult. IF no vacuum, drawing is easier, maybe too easy. check for tight seals everywhere. As everyone already said CHANGE coil. 2.5 that it came with is FINE. I am using one as we SPEAK. And, it is producing clouds of vapor. On a 50/50 PG/PG mix of juice. Is the center post of your battery getting unduly weT? Sure sign of flooding, do NOT let it remain there, keep it dry as much as possible. A VV or VW mod can be harmed by leakage, even a eGO. IF NOTHING else works, PM me, and I will send you a EVOD, that I've had a while, and KNOW is working quite well, and compare the two, look for any differences in tightness of parts, missing seals, etc. Simply PM me name and address/phone number.
Yellow Hawk (Real Name)