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Exhaust manifold to exhaust gas recirculation (EGR) valve tube
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EGR vacuum regulator solenoid
Positive Crankcase Ventilation
The positive crankcase ventilation system recycles crankcase gases back through the engine where they mix with the incoming air charge. All the combustion gases which enter the crankcase flow through hoses out of the valve cover into the intake air system. It is a completely sealed system which helps to reduce hydrocarbon emissions from the engine.
Exhaust Gas Recirculation
The exhaust gas recirculation system reduces the formation of NOx (oxides of nitrogen) by recycling measured quantities of exhaust gas back through the engine where they mix with the incoming air charge.
The exhaust gas recirculation vacuum regulator solenoid is controlled by the powertrain control module with ground pulses. This regulates the amount and duration of the signal supplied to the exhaust gas recirculation valve and therefore the valve lift and opening times are controlled.
