need some help.. thx guys

hi guys... I got a del sol 97, and I just Realised that there's some funny smell come out from the exhuast when the car is running (100% sure out from the exhuast). no smell when the car is off.. and it smells like gasoline but not exactly.. don't really know how to describe the smell. just wondering if you guys have any ideas?
thx

if the car is running way on the rich or the lean side...it will cause a smell. Rich will definately cause a gas smell...and lean usually causes a rotten egg smell....check your plugs, they never lie.

it's not really smell like gas, but I just couldn't find any better word yet...
anyway, the smell out from the exhaust as long as the motor running.
Also, 2nd question, there's some very light white smoke as well (not really a lot but quite), those smoke is like caused by cold weather but just seem to much to me. if it is really cause by the cold weather, those smoke should be gone since the motor started warm. however, it would stay on until after a quite long drive.
any suggestion guys
thx....