Everything runs great and then it will randomly just drop in rpms. If I take it off plane it sounds rough at an idle and will not come out of the hole. It will stay on plane however, it just runs much slower and at lower rpms. Then it starts running properly again, but it will evetually do it again.
Took it to my mechanic and he lake tested it twice and decided it was the power pack. Replaced the power pack and it still has the same problem.