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.
Here are just a few things stress does to your body: 1  It weakens your immune system. 2  It makes you fat and shortens your lifespan. 3  It can contribute to sexual dysfunction for men and women.