Originally Posted by ah-kay

The chance will be high. You never know until you try it. When I did my CDI, 5 injectors came out with the slide hammer but not the 6th cylinder one. It is way at the back which makes it is awkward to slide the hammer. Not sure whether it was the awkwardness or it stuck good. I couldn't remove it.

I bought another extraction tool but it required to remove the top of the injector, put an insert in and thread it out. Even that tool had a hard time extracting it. Bottom line, it is not easy and no fun.

Good luck.