Only way to get all the bad gas out is to drain the tank completely, and fill it up with good gas. You would need to also flush out the fuel lines.
I would recomend getting all the gas you can out of the tank, and using it for a lawnmower or something, and filling 1/2 full with premium and a good quality injector cleaner/dryer like Lucas, STP, or Gumout (in order of my personal prefrence, but every one has their own prefrence).
I have to find my Jeep repair book for some specs on fuel pressure, but I'll be willing to help you through this if you want to do all this yourself.
If you don't want to takel the problem yourself, try the above solutions, and talk to a reputable mechanic (not the ripoff artists that charge $100 for a fuel filter change), and let them know EXACTLY what you have experienced and what you have done.
You can dramatically reduce their diagnostic time by letting them know what exactly has been done, so they know where to start next.
Sunday, July 22nd, 2007 AT 1:39 PM