Understanding the appropriate procedure and diagnosis codes for a particular study question is an important part of analyzing Medicare data. These codes are very specific and can change from year to year as new codes are added and others are discontinued.
There is no wear-out factor in the coil itself other than thermal cycling and the damage it may cause. Boots and wires do age, resulting in reduced insulation value over time. The key to correct ignition system diagnosis is to understand the details of how the system you are working on really functions. PAGE:
Best Answer: If it was a bad ignition coil, that would not allow the spark plug to ignite the gas in the cylinder, normally most, if not all the air/gas mixture would be pushed out of the cylinder, this unburnt air/gas mixture is sometimes ignited by another cylinders hot exhaust gas mixture causing backfires.