hi hi I have a singer that does this, I will take my foot of the pedal and it is still going it makes me thinkI am doing something wrong, and I worry about blowing up the machine, I have taken the plug out of the machine, and even clean out the pedal, and it still does it, guess I should take it in but the dealer is about 120 miles away from me, so this is an all day trip,,,,, anyway just thought I would let you know you are not alone and hang in there, ......