Firstly, Kojima stated that Metal Gear Solid V: The Phantom Pain was the toughest game to developer so far because, not only he had to create a whole new engine, but the entire studio had to be restructured. (gamepur.com)
They have just come back to him saying, the air pressure from the tubro didn't fit in with the semi broken piston and Now the ute won't start at all and need a whole new engine! (humblemechanic.com)