Sure if the valve gets stuck open and the flapper get stuck closed.
If the engine were to backfire for whatever reason and the pcv valve is stuck open, the backfire could carry into the crank case and ignite the crank case fumes. I have seen valve covers blown off an engine from this situation.
It is possible if it is stuck open, but highly unlikely.
If it's stuck in the completely open position, it can.
The heater control valve is stuck open.
Dirty or stuck open needle valve in carburetor.
Check for a stuck open thermostat, check for an always on radiator fan, control valve stuck partially open or a clogged heater core.
Usually the purge valve fails and gets stuck open or something goes asunder and signals the purge valve to stay open.
Usually the purge valve fails and gets stuck open or something goes asunder and signals the purge valve to stay open.
yes. a valve in the open position will prevent compression, thus no combustion.
If the egr valve was stuck open, the engine wouldn't idle. If the egr valve was stuck closed you may hear excessive pinging (spark knock) and in most vehicles, the check engine light would illuminate.
Yes if it is stuck open.