Moving from tech support to pre-sales within the same organization is not uncommon - support have deep technical knowledge of the product, have customer facing (at least telephone) skills, are used to juggling multiple ongoing conversations, etc.
Moving from engineering, if you are in a role that requires you to understand the whole product, you are part way there. Communication skills perhaps less so (unless you run engineering TOI presentations for other parts of the business or within engineering), and customer facing skills possibly not so well honed.
A move from engineering to profession services (which adds a customer facing element) to pre-sales, to (if that's what you're aiming for, and is still attractive having worked with sales people while in a pre-sales role) sales, might be a better path.
Enterprise sales is less about the product, and more about developing relationships ("people by from people they trust"), constructing a deal that works for both organizations, and closing the sale.
Technical pre-sales is a question of mapping the customer's business requirements to the product's capabilities, and demonstrating that your company can solve their specific needs better than the competition.
