well after going to the ER and almost taking out my eye - here's my 2cents...
1. put WD-40 around the top opening of the injector
2. put the screw back in and pry the flathead and try to rotate the injector on its axis. (basically try to get it moving...)
3. try to pry it out now with the above instructions...
4. GET THIS TOOL!! it was like $12 at the auto parts store.
there are two holes on the side of the injector. you can almost see it in bryce's photo.
(I saw this tool in another post, but didn't think of it much then... now it makes a whole lot of sense...)
5. gently pull, and it should come out.
let me put it this way - i tried the screwdriver only method + vice grips and didn't get anywhere. got this tool, and i was able to take it out, then go to the junk yard and take one out in less than 15 mins.