Originally Posted by #1piecemaker
Rethread your whole machine and see if that helps. Sometimes the problem is so obvious, but yet hidden.
When you rethread your machine make sure that the presser foot is up. If it down the thread will not seat correctly in the tension wheels so the machine will not sew right. A check for this is to put the presser foot down after you have rethreaded and gently pull the thread. The needle should bend slightly. If it does then the threrad in is the tension wheels correctly. If not it is not so rethread the machine.