2000 Blazer no start

Alright i really need some help here... So last week i couldn't get the blazer started so i first changed out the spak plugs and wires ,cap and rotor. no luck...
left it sit over night and it started right up. So i changed out the fuel filter witch
was clogged with this black maple syrup lookin stuff. It was working good for about a week, now today i coudn't get it started, my fuel pump is not comming on when i turn the key i alredy checked the relay and my check engine light is on.......any suggestions on what coud be the problem?:banghead:

If you had syrup like stuff in the filter better pull the tank out and see whats, what!

Well i figured it out...........the fuel pump was def. dead i put a new one in today(only 4 hours of work!:banghead: ) I have one question though when we looked inside the tank there was a green ball a little bigger then a ping pong ball floating inside the tank. I have no clue what this ball is or if it should even be in there. Does anyone know anything about this?

2 door 2000 blazer, 146,000miles

Well i figured it out...........the fuel pump was def. dead i put a new one in today(only 4 hours of work!:banghead: ) I have one question though when we looked inside the tank there was a green ball a little bigger then a ping pong ball floating inside the tank. I have no clue what this ball is or if it should even be in there. Does anyone know anything about this?

2 door 2000 blazer, 146,000miles

It probably came out of the filler neck. The ball is a check valve ball. This allows gas into the tank, but prevents gas from going back up the filler neck.