A better example is therapist: in any other sentence you wouldn't notice what I'm getting at, the pun is there but the stress on the words is different. Dr. Pornestach, Therapist, it's possible to push the conjunction but we mostly don't.

"No va" is just "it's not going", which is about as awkward a way to describe a non-working vehicle in Spanish as it is in English. If my Nova broke down, yes, I'd make the pun.

Now, if they'd tried to sell the Chevy Es Chingado...