J-10
Flew mine on a JC P-180 and did plenty of spins and never had an issue. I do have a couple of KingTechs in two other jets and one of the things I noticed that bothers me about the system connection is the cable leads into the ECU. They have a lot of side-to-side play after connection. I’ve not had any issues but maybe there could be A greater potential for intermittent connection when doing the spins?? Just a guess. Sounds like your fuel system is OK. What kind of UAT are you using? I had a BVM UAT in mine.