Midwestdrifter - any update on this? did the change in EST finally fix everything? I am still trying to troubleshoot this issue. I still randomly get the no signal error. I have redone all my connections to remove any kind of wiring issue. My latest thinking is that it’s the altitude kit – not from any scientific reason, just because its either that or the EST (or the ECU, but that seems least likely). So right now I am running without altitude kit – problem hasn’t shown up yet – but then, it probably wont until I least expect it.