Billybolt,
Unless You added a pcv or Your draft is not stopped up, I would not think a little whiff of smoke caught in the sunlight would be of any concern. Someone with more experience than me (Wrenchbender Ret.) or others.
Joe H beat me too the post


"All right, they're on our left, they're on our right, they're in front of
us, they're behind us...they can't get away this time"

Lt Gen. Lewis B."Chesty" Puller, USMC