sounds like you may have two problems one easy the other more of a challange. the easy one would be no power- pull both terms off batt clean with wire brush on both batt and cables reinstall and tighten. that should fix no power no turn over. next and it really at this point doest matter what size eng because all gas engines need air mixed with fuel going in compression spark to egnite and exhaust unrestricted. so when car turns over but doesnt start you need to know if there is fuel at least at fuel inject rail and or is there spark .one of these will not be present when car turns over yet no start. repost when you know whats missing and then eng type would help