Truck shut off

[Mikey's250]

I have had my FU for about 3 months and not had any complaints, I love it. But about 2 weeks ago I had a no start issue. One morning truck just turned over but no start. I flipped the switch a couple times and tried to start again, finallly started on the 4th try and no problems until today. I was stopped at a red light and went to switch over from 80DD to 100perf (#3 to#4) and as soon as I the switch clicked the truck imediatley shut down. I switched back to 80DD(#3) and truck started no problem. Went on to where I was going and went through every position with no problem.


Anybody have any ideas if something is wrong or going wrong? or what caused my issues?