Does anyone have any idea why the Evod tanks I bought aren't working on my mvp 2.0 I get a ohm reading of 2.2 I believe it was, I get vapor production but its just a constant burnt/plasticy almost taste every time. When I go to unscrew the Evod from the MVP there will be a little smoke coming from where it connects onto the mod. I have tried low volt settings and watt settings. I just want to be able to use the Evods without that horrible taste. I am nervous to mess around much with the center pin and mess up anything internally on the mvp 2.0
Don't mess with the center pin on your MVP, unless it's been pushed in by screwing things on too tight. A bit of vapour coming from the bottom of the clearomiser is not unusual if you take it off immediately after vaping - it's just vapour.
BCC devices don't need the high volts that some other devices do, and in fact will burn if you try to run them too high. Kanger put a little card with ohm/voltage recommendations that basically equates to 6 - 6.5 watts. Most people throw the card away and burn the heads anyway. I've written a little blog on using BCC devices with factory heads which you might find useful:
http://www.e-cigarette-forum.com/forum/blogs/fabricator4/5045-bottom-coil-clearomizers.html
The only other thing I'd add is that once you've burnt the head it's always going to taste foul until you replace it. Start with a fresh head, make sure it is wicking properly before you power it up, and don't go over the recommended settings until you really get to know the device.
For a fresh head, I fill it then take a few draws until I can taste that the juice has wicked through. I then start at minimum volts and work my way up until I am at the recommended setting. Once it's running OK, it may take a ml of juice or so before you get full flavour and vapour. This is called "running the head in", and a gentle run-in will prevent burning of the coil. You may notice some off flavours during this period. These flavours may be residues from manufacturing, so I like to boil the heads for a few minutes before I use them for the first time though many people either don't bother or don't notice any problems.