(See How Catalytic Converters Work for more details.). Controlling the engine is the most processor-intensive job on your car, and the engine control unit (ECU) is the most powerful computer on most cars.
â¢ Accidental poisoning is one of the leading causes of GI ulcer disease. This can be from plants (for example, toxic mushrooms, castor beans, or sago palm), pesticide or rodenticide toxicity, chemical poisoning (often with ethylene glycol or phenol), or heavy metal poisoning involving zinc, iron, or arsenic.
Report Abuse. Most minor, single mouth ulcers are caused by damage to the mouth. For example, you may accidentally bite the inside of your cheek while you are eating. Damage to your mouth can also occur if you use a toothbrush incorrectly, or from a sharp tooth, or filling. Recurrent mouth ulcers The cause of recurrent mouth ulcers is often unknown. However, there are a number of factors which may increase the chances of you getting recurrent ulcers.