I have to agree with MikeL here. At this point I would urge Shd3920 to seek out the help of an experienced modeler, or maybe a LHS. Inexperience in how to tune and engine for break-in may have caused serious damage to the engine. And if it's not toast already, improper breakdown and trying to reassemble could very well kill it if it's not already dead. I'm not trying to be harsh here, but actually I'm trying to help. If you're not even sure where the needle valve is, and it's proper settings for tuning an engine, then it's time to stop where you are and seek out help in this. RCU is a great source of information, but there are still times that having a pair of real world eyes and ears can be the best help of all. We can tell you how to tune, or break-in, an engine here. But a real person can show you instead.

Ken