Problem is with the driver side flush floor. When you retract the slide it must ride up to clear the floor inside. It's just a tapered piece on the front of the slide that does the work. These motors are minimal at best, running the genny won't help the engine needs to be running unless the engine batteries are really tip top shape. They came out with a higher torque motor but it's on your dime. If it gets too bad you can take it to a starter rebuilder and see if he can up the torque. I've heard of folks doing that. Good luck.