I'm dealing with this same problem of a stuck injector. Four came out fine, the fifth was like the OPs in that I was able to get it loose and get fluid in there and it eventually came out. But the last one won't budge. PB Blaster / Kroil / etc. just sits on the top and never goes anywhere. The plastic has broken off and I just have a metal stem sticking out. I've been able to put a screw with some washers in it which allows me to use the slide hammer tool connected to the washers but it still won't budge. A pry bar under the washers isn't getting anywhere either, the screw slightly bends and it slips off. Any advice on how to get this sucker out is appreciated.

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