We had this with our 2008 Southwind on a workhorse chassis. The gas pedal is a rheostat and needs to be replaced. You can easily unbolt it to find the part number and hopefully find one at a reasonable prive. We had to pay $750 for ours as they were no longer making them !! But you will get stuck on the highway with all power going off (no forward motion) until you get it fixed. Turn off the engine (once safely out of traffic) and reset the engine computer - usually works to get you on down the road. SCARY! If you want to chat, i am at bobthomas1957@gmail.com