(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.
Here are some other causes of mouth ulcers: 1  Food allergies. 2  Eating acidic fruit such as oranges, tomatoes and pineapples. 3  Viral/bacterial infections.  Poor oral 1  hygiene. Gum disease. 2  Sinusitis. A deficiency of Vitamin  B. Dysfunctional immune 1  system. Poor digestion.  Stress.