A leak from the coil would be a possibility and a quick substitution will answer your question. If you can monitor the output voltage from your oxygen sensor, then you can quickly see in which system the fault lies. If the voltage increases upon hesitation it is seeing unburned fuel, i.e. ignition. If the voltage decreases the lack of fuel is the culprit. The EHA mounted on the fuel distributor head is a likely hesitation source. This can cause a lean fuel mixture on acceleration and poor power at full load. Good luck!