Yea I hate to say it but I don’t think they have a clue and it’s sad because they should be the best around for your vehicle especially for the money you’re paying them. You don’t just start ‘swapping’ injectors around, they have a scan tool that they can use as a lab scope to look at the injector firing event to see if the injector is having an issue or not they just don’t seem to be aware of this or know how to do the test. I also think their theory is crap, if you have low compression on one cylinder do a leak down and see where it’s going especially on Honda’s if the valves don’t get adjusted correctly it will burn up the exhaust valves and cause a compression loss. Have they even bothered to check the cam timing? Or even check for slack in the chain? This is a HUGE problem on the K series engine, when it runs low on oil it will starve the timing chain for oil and cause it to wear out prematurely as a result the cam timing will be off causing misfire codes. BTW misfire codes are not accurate at all so you have to take them with a grain of salt. Also Honda’s hardly ever have fuel delivery problems so I think chasing a bad injector is a waste of time, I think you’re looking at a mechanical issue and they are chasing their tails with their theories and backward tests at this point.
This type of ignorance is one of the main reasons I became ETCG, good luck and keep us posted.