thanksHmmm... my Pico mods have been very easy to get along with, at least for my modest tank collection. They've all worked well.
It would be helpful to know what tank/atty you're working with. I had a Tron-T tank with an airflow adjustment collar that prevented a good connection to the 510 on the mod.
And yeah, a burnt anything taste is a dead giveaway for a coil change.
Don't give up in the Pico yet. There aren't many devices at that price point with its reliability and versatility.
problem solved
loose atty