next time...
The next time some nice young lady in a red Toyota says your truck as a problem because it's smoking...
tell her that your truck ALWAYS HAS A SMOKE AFTERWARDS... !
But don't end there. Once she cools off a little, give her truck the once over and ask if she minds letting your truck have another round with her rig.
This should be sufficient to leave her speechless and the REAL problem should go away.
Be sure you play out the subtle nuiances - raising of one eye brow, scratching the pavement with one of your toes, hands in your pockets, casual facial expressions with a hint of mischief in your voice, etc.