Welcome to Automotive Forums cm3802.
It makes it easier for us to help you if we know what year your blazer is.
If your sure that it's gas then you have a badly flooding motor. I guess that it ran rough.
Which basicly means that there is something wrong with your fuel injection system, or your ignition system.
There is a pretty good fuel systems test guide located here
http://minimopar.knizefamily.net/fuelsystem.html
The first thing that I would do is test your fuel presure.
Have fun with it.