Lately I've been smelling fuel around the truck. I don't see any leaks on the ground so I'm wondering if the evap system is somehow always venting. Truck is 92 4x4 w 3.9l

 

Almost any of the rubber around the fuel tank may be going bad - grommet for the filler into the tank, vent tube up, the evap system hoses, etc. When I had my bed off doing my fuel pump, I just replaced ALL the rubber back there.

 

I will try and isolate it. But I only smell it outside the cab both front and rear of truck

 

Yes, and all that's outside the cab.

Don't forget to check the evap canister hoses at the front, if that's where your evap canister is (like on my Gen1).

RwP