I have almost the opposite happen to me. If it's hot and is unplugged it'll fire right up. If ITS Cold Outside AND THE MOTOR Is cold it takes forever to fire up. I feel like it only starts after the Pistons have cranked over soo many times and now the motor is a actually a little warm from trying to start it for so long. THE ONLY TIME I HAD THIS IS SUE WAS WHEN I FIRST INSTALLED THE MOTOR AND THE SENSOR WAS BROKEN.