No, diesel engines don't have ignition coil as they work on compression ignition and not on spark ignition as in diesel engines. Glow plugs used in diesel are like small electric heaters which use the mechanism of heating due to resistance during electrification.
Walking pneumonia is generally treated with antibiotics. Mild infections are often not treated because they tend to clear on their own. With treatment, most people begin to feel better within a few days. Many over-the-counter medicines used for colds and flus may not help with complete relief of symptoms of walking pneumonia. It's important to talk with your doctor about any medicines you are taking or planning to take.
Walking pneumonia is simply a milder case of pneumonia. It can be caused by a number of different types of bacteria and viruses. The most common organism responsible is the bacteria Mycoplasma pneumoniae. The viruses and bacteria that cause walking pneumonia are contagious. However, it is unlikely that a person with walking pneumonia would give another person this condition. Instead, when spread, these germs are more likely to cause upper respiratory infections such as the common cold or flu.