Honda Civic Journal Logs    

► Air Impact Wrench - Honda Civic
► Bolt and Nut Torque Specifications
► Boot and Front Axle Replacement
► Changing the Engine Oil - Honda Civic
► Changing the Timing Belt - Honda Civic
► Changing the Water Pump - Honda Civic
► Engine Coolant Temp Sensor - Honda
► Fuse and Relay Box - Honda Civic
► General Maintenance Schedule
► Inspecting the Idle Air Control Valve - P0505
► Jerky steering wheel Fix - Honda Civic
► Jump start your car battery - Honda Civic
► Learn to drive stick shift - Honda Civic
► Pass Smog Check - Honda Civic
► Repairing the Alternator - Honda Civic
► Repairing the Brake Pads - Honda Civic
► Repairing the Brake Rotor Disc
► Repairing the Distributor - Honda Civic
► Repairing the Front Hub Bearing
► Repairing the Fuel Filter - Honda Civic
► Repairing the PCV Valve - Honda Civic
► Repairing the Radiator - Honda Civic
► Repairing the Speed Sensor - Honda
► Repairing the Starter - Honda Civic
► Repairing the Thermostat - Honda Civic
► Replacing Exhaust Pipe Gasket
► Replacing Front Rear Shocks - Honda
► Replacing the CYP Sensor - Honda
► Replacing the Fuel Pump - Honda Civic
► Replacing the Oxygen Sensor - Honda
► Saving Gas - Honda Civic
► Stolen Car and Kill Switches - Honda
► Trouble Codes (MIL / CEL) - Honda Civic
► Washing Machine Repair - Bad Motor


Engine Oil ChangeBrake Pad ReplacementBrake Disc Replacement
Axle ReplacementHead Light Bulb ReplacementSide Door Window Replacement
Alternator ReplacementBattery ReplacementTransmission Clutch Replacement
Front Hub Bearing ReplacementStarter ReplacementFuel Filter Replacement

Repairing the PCV Valve - Honda Civic

Getting rid of causes of engine vibration during idle can be challenging. There can be various places that can be responsible for the mystery.

Today, I've finally found the culprit on mine, my Positive Crankcase Ventilation (PCV) Valve. The PCV valve is nothing more than a tiny plastic one-way valve that's connected from behind your engine block inside a hole breathing chamber to a hose that extends into your air intake manifold.

Location of PCV hose leading to Positive Crankcase Valve underneath the intake manifold

PCV valve shown after unplugging

The PCV valve is designed to take the blow-by gas produced from constant crankshaft activity back into your intake manifold to prevent blow-by gas from leaking into the atmosphere. If your PCV valve gets stuck or doesn't function properly, it can cause pressure build up inside your engine and low idle resulting in engine vibration.

After finding a way to get to the PCV valve, it turned out that my PCV valve was clogged with oil. After replacing it with a new one, my idle level remained above 300 rpm and the engine vibrations were greatly reduced.

PCV valves are less than $5 from your local auto store but can make huge differences.

Here's how I replaced my PCV valve (This is easier done during an oil filter change).

1. Parked the front of my wheels over car ramps (with Emergency Brakes on).
2. Placed a light underneath the hood to get better visibility.
3. Reached in behind the oil filter and tugged on the PCV valve hose and PCV valve out of it's socket.
4. Removed the PCV valve from the top and removed the clamp holding the hose.
5. Replaced the PCV valve.
13. Worked backwards to reinstall the new PCV valve.

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Do it yourself Honda Civic repairs and maintenance