Hi Ant,

There may be many different responses to your question as I do not know your specifics of the equipment installation in the aircraft and how the pump and solenoid cables where routed in ref. to the ECU / Rx locations. The greater the separation of these components in ALL installations the better.

I can only guess that it may have been the position of the older SIMJET-D2 ecu in close proximity to your Rx. In addition, the D2 ECU can be influenced by the TX. under some conditions while in very close proximity to the aircraft.

Carbon fiber airframe reinforcement will have an impact as well on RX range checks.

In any case, it is good to see that your doing the correct checks before flight.