i smell gas when i get off the interstate and only when i get off the interstate any advice im getting like 16 mpg and i cant figure it out ive adjusted the timing replaced both fuel filters and all the vacuum hoses&plugs and wires 

Take the air cleaner housing off and inspect the tiny rubber boot on the accelerator pump which sits atop your carburetor. Right up front. Has a lever attached with a pin retainer.

 

Could be something else but that is a current problem for a couple of us with old carbs.

While you are at it, look for a leaky butterfly valve. That's where mine recently started to stink. Gas was dribbling out the side of the carb through the worn-out bushing.

Right , thanks Ben. The metal fatigue issue ...... grrrrr.

 

But only coming off the highway ....hmmmm

Does it start to act up as well? Or just the smell of fuel?

Does it start to act up as well? Or just the smell of fuel?

some times its misses and sputters and today i noticed wen i was fueling up when i took off the gas cap there was no pressure it didnt hiss like t normally does