CM871 poor power and fuel econ

[Rawze]

(09-19-2022 )Grounded Pilot Wrote:  ... His conclusion was that I have injector cup issues due to the carbon “slime” build up around/above the first “step” closest to the tip on the injector. Does this sound like a plausible explanation?
...

If there is coolant flow restriction to the injector tip then yes, it can get leaky faster then it should. It will also be a visible problem when the injector is removed, via a visibly blackened burnt-looking end on the injector.