Not a blocked injector, definitely.
If you want to see what one blocked injector does, pull out one of the plug leads, and do a mag check. When the cylinder whose plug you pulled has the other plug not firing as well, the engine shakes like hell. You can't miss it, especially at 2000rpm.
But you could fly like that, in an emergency. There is a loss of power but not enough to stop you flying. The engine is very unlikely to actually fall off.
You could have had all injectors partially blocked but then you have to wonder what else has got bunged up with crap... IMHO it's a problem elsewhere.