Hi and welcome to JustAnswer,
Im so sorry that no one else has responded to you.
Apologies for my delay in replying, I only just came online and saw your question. Are you still looking for help with this?
I kind of fixed it. I took it apart and cleaned it. But it only does it once in awhile. If I tap the pedal when it takes off, it will stop and then not do it again for a while.
Still working after you turn on without foot pedal?
Yes. I fixed it myself