Hi, I have a hyundai tiboron 2003. Every time I put gas in the car, it will not start up. The rpms go down to zero, and I have to start it up about 3/4 times. 3 mechanics and the dealership could not find out the answer. Now when I put gas in, I have to leave the motor running. That works only if it doesn't take to long to gas up. In other words after a minute or so, the motor will automatically turn off. Anyone have an answer?
Thank you

You might have picked up water from a previous fill up. Dry a can of Dry Gas on the next fill up. Cars don't burn water very well. I'll bet it happened very suddenly after a fill from a particular station.

Have you ever changed the fuel filter?