Ignition is usually the easiest of the three to check because on most engines, all you have to do is pull off a plug wire and check for spark when the engine is cranked. On coil-over-plug DIS systems, there are no plug wires so you have to remove a coil and use a plug wire or adapter to check for a spark.
Stress can affect every part of your body. muscle aches, head aches, how your hair grows, the texture of your skin, it can affect your menstrual cycle.
Too Much Stress. The way stress affects the immune system is complicated but explained well by Harrison Wein, Ph. D, in the National Institutes of Health newsletter, Word on Health.. In the article, Stress and Disease: New Perspectives, Dr. Wein states that stress produces a hormone in the body called cortisol. report in the November 1990 edition of Psychological Bulletin, states that stress suppresses immune system function and that, over time, the immune system does not adapt but instead continues to wear away. What was intended to protect the body, begins to harm it when unregulated.