Cold weather, raw fuel smell

[Ol' Sarge]

During cold weather, I smell diesel fuel from under the hood and in the cab. Haven't found any leaks or drips. Seemingly a seal is 'weakened' somewhere, but where do I start?

More stats? It's a '99 F250 7.3 with 150,000 miles.

I can't believe this is an exhaust smell (though I won't discount the possibility). It definitely smells like fresh fuel, just as if I were standing at the fuel pump. Even without the truck running I can smell it from under the hood on the coldest days (like single digits or less). Yet there is no spotting on the ground or under the hood that I've seen.

[SixStringMadness]

what model truck? Could be leaky exhaust header.....

[Galaxie]

Post up some stats. I can smell mine more in the winter. The air is blowing more and just smells more. I started my Mustang today and she stunk as well too.

Seems like everything smells more in the winter.

[Ol' Sarge]

Sorry, thought all that info was to be posted; I filled it out on some other page... just not very computer savvy.

I'm driving a '99 F250SD, 7.3 liter, 150,000 miles.

I can't believe this is an exhaust smell (though I won't discount the possibility). It definitely smells like fresh fuel, just as if I were standing at the fuel pump. Even without the truck running I can smell it from under the hood on the coldest days (like single digits or less). Yet there is no spotting on the ground or under the hood that I've seen.

[jesilvas]

I bet it's fuel. Either the fuel bowl is leaking somewhere or the line from the bowl to the pass fuel rail. It has a bracket that rubs a hole in it.
You smell it cause you're drawing in air from the cowl.

[oceanstateperf]

Check the drain valve on the fuel bowl. Mine started leaking when it got cold this year. Also check the o-ring on the fuel filter cap.............I had one that had a tiny defect, finally found it when I opened the hood on a cold day right after start up and it was shooting a tiny stream of fuel up against the underside of the hood