The golf cart is a 36 volt 1993 EZGO. New batteries, cables, rebuilt motor from Plum Quick and new 400 amp motor controller. It's slow and just barely crawls on the slightest incline with just one person on it. When you push the pedal it engages for the first inch or so and then it's just empty space. No matter how much you push the pedal or let off no change. Thank for any advice.