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 a non-medical term to describe a mild case of pneumonia. It can also be called atypical pneumonia because the disease is different from more serious cases of pneumonia caused by typical bacteria. Pneumonia is a disease of the lungs that often results from a lung infection.