Refers to da "ideal" performance --- i.e., starting right up with just a brief cranking --- when firing up your car's engine; said perfect start sounds something like a famous baseball-player's name: "Carl-Yastrzemski --- VROOM!"
I imagine that some folks night find it a little odd to have a car's crank-and-catch sounds described as a "sports-star start", but I doubt that "The Great Yaz" would mind all that much, especially since said onomatopoeia description refers to a positive and welcome sound.
by QuacksO September 3, 2019