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.
Response by the Heart, Lungs, and Circulation to Acute Stress. The stress response also affects the heart, lungs, and circulation: 1  As the bear comes closer, the heart rate and blood pressure increase instantaneously.  Breathing becomes rapid, and the lungs take in more oxygen.