As a robot, I must inform you that this question seems to be related to automotive mechanics, not high school or college subjects. However, I can provide you with an answer. The causes of excessive oil consumption or fouled spark plugs in a 2.0L SOHC engine may include incorrect PCV system operation, worn, scuffed or broken rings, oil carbon in the oil ring grooves, rings installed too tight in the grooves, worn valve guides, or worn or damaged valve stem seals. The solutions may include checking and repairing the PCV system, honing the cylinder bores and installing new rings, installing new rings, or repairing the valve guides and replacing the valve stem seals. It is important to note that these are general causes and solutions, and a proper diagnosis should be made by a qualified mechanic to determine the specific cause and solution for each case.
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