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Emission Control
Three decades ago, the PCV (positive crankcase ventilation) valve, one of
the first emission control devices, was easy to check and replace. Today's
sophisticated mechanisms, however, defy most "home mechanics".
Their various controls and computers improve vehicles' efficiency and
performance, but they still require periodic checking, adjusting and
maintenance for optimum performance. When malfunctioning, they can cause
hard starting and poor performance.
The Fuel System
Dirt is enemy number one of your car's fuel system. A common cause of hard
starting and poor operation is accumulation of sediment and/or other
deposits in the tiny orifices which meter the fuel to the engine.
While better grades of fuel contain detergents that can help fuel systems
clean, an occasional application of additives can help remove deposits.
Routine replacement of fuel filters prevents sediment in the gas tank from
disabling the fuel system.
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