Gosh, maybe. I'm definitely good with cars, the Mystery Machine- that's my van- is tricked out with all sorts of devices I've installed.

[Not even Velma knows half the shit he's designed and built for that van, though they're both the resident geniuses when it comes to engineering. Velma just happens to be more of a genius at basically everything else.]

I haven't really tried to do much engineering work outside of traps and the Mystery Machine, but maybe you're right.