i just changed the coil with the one came came in the box. i selected new coil and now its operating at 2 volts .159 ohms and 16 amps. it was operating at 4 volts, 4 ohms, and 10 amps out of the box and it puffed nicley. now its not very good. the coil looked different then the one that it already had in it. did i do something wrong, how do i get it back to its original settings?