However, there is no reason to be sheepish about asking questions of the community to help broaden your knowledge and understanding of how aircraft engines work, and especially to get some ideas about diagnostics. Opinions will be tossed into the ring that span the spectrum of experience and competence, and they're all free. Some will be wrong. Some will be dead on. The conversation is for entertainment, and at no time should anyone be chided for using the Internet to research their problem, or discouraged from seeking knowledge on a topic that all pilots should be educated on.
Darinh owns his bird, and he can shoot it repeatedly with a 12 gauge and set fire to it if he wants. But if he's going to fly it, we should assume from his well written questions that he's a level headed owner and will seek a thorough inspection and a qualified return to airworthiness, whether he's solved the issue himself or not. A suggestion from one of you may end up being relayed to his A&P, solving the mystery, and saving darinh a lot of money in diagnostic time. Nothing wrong with reminding someone about the risks of unqualified work, but please be respectful and address others as you would if you were speaking with them in person, and let's not dwell on it.