What size needle are you using? Change to manual and give it a try. Can you adjust the bobbin tension? Make sure your needle is in right. Try dif tensions before you start a quilt. On my machine the numbers mean nothing as for tension--do 1/4 turn to loosen and go as much as a full turn if you have to. I would say top tension is too tight. Usually to the left loosens it. Also is your bobbin thread thinner than the top maybe? I don't have that machine but most are similar--I have a Tin LIzzie 18LS.