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1984 - 1995 Honda Civic/CRX/del Sol Positive Crankcase Ventilation (PCV) System

Honda Civic/CRX/del Sol 1984‐1995

SERVICE

Positive Crankcase Ventilation (PCV) Valve

For PCV valve removal, refer to Routine Maintenance of this information.

1. Locate the PCV valve. With the engine running at idle, use pliers to pinch the PCV hose between the valve and the intake manifold. It should be possible to hear the spring loaded valve click shut.

2. If no click is heard, remove the valve from the engine but leave it connected to the intake manifold. A hissing sound should be heard and vacuum should be felt at the valve inlet.

3. If no vacuum is felt, remove the valve from the intake manifold hose. The engine should stall or almost stall. This will indicate a stuck valve or clogged hose. Check the breather hose for clogging or leaks and replace any defective parts. 

Exhaust Gas Recirculation (EGR) System

FUEL INJECTED ENGINES

General Information

See Figure 3

The Exhaust Gas Recirculation (EGR) system is used to control emissions measured at the tailpipe. Components included are the EGR valve and controls. The EGR system uses a poppet type valve to regulate the amount of exhaust gas flowing into the intake manifold. The flow path is cast into the cylinder head and does not use any external tubing. A control solenoid valve regulates the amount of vacuum to the EGR valve. A Constant Volume Control (CVC) valve provides a constant amount of vacuum to the control solenoid valve over a wide range of engine vacuum. Download File PDF

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