I have a problem with my GRT Sport SX, ARINC module, and Garmin 430W. They all communicate great until I start my engine. I have tried it with mag only and electronic ignition only with no success. I tried shutting down the 430W and engine, restarting the 430W with no success. I have to shut off the SX and 430W. Then, when restarted, communication is good. I have a backup battery that runs the SX during engine start so I don't think its voltage sag. Is this probably an ARINC wire routing issue? Any other ideas?
Thanks in advance,
Tom
Thanks in advance,
Tom