I've been trying to learn more about engine monitor data, lean tests, mag checks, etc. trying to get a feel for my engine and establish a baseline. Wondering if there is a thread or a resource that has normal vs abnormal and what the problem was... i.e. example of faulty mag vs faulty plug, example of failing exhaust valve and what clues in to problems ahead, good GAMI lean vs poor, etc. I tried a search but found several threads that were old and pics were scrubbed. I'm also curious to see what different ranges in EGTs and CHTs are between cylinders are normal. Anyone have some good learning examples or know of a good primer for this?