Plug reading useless

Plug reading is highly valuable, and a lost art these days. The plugs tell you what is happening in the combustion chamber of each cylinder and informs what is actually happening inside them without guessing.

Sure, plug temp and gap can change the results a bit, but if they are relatively close to each other throughout the engine, the information the plugs provide is solid evidence of what’s occurring inside each combustion chamber across the engine.

Only a fool would ignore such definitive information.

No good scientist rejects solid data to help inform their conclusions.