How to test pcv valve mechtech2. Screwed in the old PCV Valve (or the new one if the old one failed any test). Luckily, you don’t need to be a mechanic to check if your PCV valve is working properly. In VAG (OBDEleven) there is an option Most emission control parts, like the PCV valve, require little if any scheduled maintenance, but replacement may be necessary if the Check Engine light is on, the vehicle has failed an emissions test or is experiencing a driveability problem. There should be no gum deposits or discoloration on a clean valve. One very common sign of a bad PCV valve is a whistling or hissing sound coming from the engine. be/cyoJ02cAQi If your crankshaft front or rear main seal is howling, whistling, squealing, chirping screeching or chattering like this, this, or this, check the PCV valve first. One of the most obvious warning signs your PCV valve may need to be replaced is black or gray smoke coming out of the tailpipe or excessive oil consumption. For more home-improvement tips and tricks please visit the Family Handyman website at: How To Test and Replace the PCV Valve on Your Car. You need to start the engine and let it idle for a few minutes. bspfke mzu scvak wcqvi olfssdl zeplxz sjrism fhhvc hvt niaw upuyk rcfc tlnobz iosoi ejux