After filling up with gas last two times the car starts ruffs and idols very ruff for a minute or two. After that it runs fine until the next fillup. I don't think it's the gas as the problem is immediate, so the new gas has not even had time to make it to the enging yet. Also after a few minutes the car runs fineon the new gas. I always put my cap on tightly. Any ideas?

 

Try one of those fuel system cleaner adders next time you fill up.

 

or like some seafoam in ur tank