Petrol smell

[step_change]

Driving home tonight roof down, all is good in the world...
Then hit a bit if traffic. Suddenly a strong petrol smell. WTF.... Then it seemed to go. A few minutes later I smelled it again. Drove on. No traffic open road. Petrol smell again. Then gone. Pulled over, bonnet up and a look around and nothing loose, nothing dripping. Did it a couple moe times. Now it's OK. Seem to have burned through 1/8 tank of gas in only 20 miles as well. not sure if I just got a few smells and I am being paranoid.
Will keep an eye on it. Any immediate thoughts guys? Power seems OK and idling is fine as well. No leaks that I can see. Will have another look and drive tomorrow.

[dhobbs]

Check you fuel cap. I had to replace mine as the seal had cracked, apparently an MOT fialure on convertables.

Have a look under the fuel tank too but please be careful, a friend of mine was trying to fix an old camper van which had a fuel leak and it all caught fire. He was very lucky, not as lucky as the van and two cars that went up in flames!