Exactly. It's called diagnosis. Nobody wants to do any of that. All they want is the answer on a silver platter. It's simply not that easy.Right here. But most people don't want to go thru all the trouble I must require to properly troubleshoot the problem. It's a lot more work and sometimes best left to professionals. Also you can't tune a carb when you have other problems or just a bad combination. And spark plug reading are useless when your valves or guides are worn or low compression and check it with a $20.00 gauge. And the list goes on and on.