The engine is equipped with a PCV system to prevent discharging crankcase emissions into the atomo-sphere. Blow-by gas in the engine is constantly drawn into the crankcase, which is returned to the combustion chamber through the PCV (breather) hose, air cleaner and throttle body.
1. PAIR control solenoid valve; 2. PCV hose; A. FRESH AIR; B. FUEL/AIR MIXTURE; C. EXHAUST GAS; D. BLOW-BY GAS; E. RETURN OIL