Ken, Check your fuel lines, both the filler and the breather lines.? They come up from the tank through the floor and under the dinette seat behind the cab passenger side.? Mine breather line had chaffed on a clamp just below the floor and fumes entered the camper to the point I could smell it.? I had to replace the breather line.? I don't recall, but I think you can replace it with a 5/8" fuel line.? I also made sure that at attachment points, I wrapped the fuel line with rubber (I used the?old fuel line)? to prevent chaffing?in the future. I hope your issue is as simple as mine to resolve.
