Strange engine event

If an exhaust valve stuck partially open it would raise
your EGT and lower your CHT

That seems like a more likely explanation than the blocked
fuel injector. The reason I think so is that on the previous
annual the other to cylinders on that side (#3 and #5) were
removed to have their exhaust valves replaced and guides
repaired. (At only 300 hours! I guess Continental still hasn't
figured out how to make cylinders like the did in the 70's
and 80's). So if the same wear is happening on #1 it might
cause it to stick on occasion.

~Paul