From Snopes at
https://www.snopes.com/fact-check/chevrolet-nova-name-spanish/ :
CLAIM: The Chevrolet Nova sold poorly in Spanish-speaking countries because its name translates as "doesn't go" in Spanish.
RATING: False
First of all, the phrase “no va” (literally “doesn’t go”) and the word “nova” are distinct entities with different pronunciations in Spanish: the former is two words and is pronounced with the accent on the second word; the latter is one word with the accent on the first syllable. Assuming that Spanish speakers would naturally see the word “nova” as equivalent to the phrase “no va” and think “Hey, this car doesn’t go!” is akin to assuming that English speakers would spurn a dinette set sold under the name Notable because nobody wants a dinette set that doesn’t include a table.
Although “no va” can be literally translated as “no go,” it would be a curious locution for a speaker of Spanish to use in reference to a car. Just as an English speaker would describe a broken-down car by saying that it “doesn’t run” rather than it “doesn’t go,” so a Spanish speaker would refer to a malfunctioning automobile by saying “no marcha” or “no funciona” or “no camina” rather than “no va.”