hughes 3000

ive had this t/c for a few years now, ive had a few rough idle cams in front of it, i could idle engine down to 4 to 500, throw it in gear and tach wouldnt even move. got it going this spring and now idle drops 2 to 300 rpm, even stalls out like low stall factory t/c i had before.question is, can i ''lose my stall''? or am i missing something?