97 Blazer won't start

My 1997 blazer has been sitting for a few months, and when i insured it to use it, i jump started it and it ran right away. The gas tank was on empty and then it died so I went and got more gas in a jerry can to put in and now it turns over but won't fire.. help please?! I got a new fuel pump put in about a year ago so I don't think it would be that

How much gas did you add to tank?
Sometimes it take over 3-4 galllon.
Can you here fuel pump prime up?
Got fuel pressure?
Like 60/66 lbs?
Got spark to more than on spark plug?
Prime it up with a little gas or carb cleaner spray.