do a search for these symptoms, its well documented... the common causes for these problems are fuel pressure issues or intake manifold leaks... based on the fuel smell you reported.. i would guess you are running rich... and dumping too much fuel into the chambers has caused your vx not to be able to combust it and stall... i would start with fuel pressure regulator and generally your fuel system.. sounds like an issue you want to take care of soon because running rich will clog up your catalytic converters (which are 1000+ and many weeks/months of waiting to get apparently) as well as the obvious danger of stalling on the highway.. good luck!