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.
If it's stuck in the completely open position, it can.
It is possible if it is stuck open, but highly unlikely.
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.
yes. a valve in the open position will prevent compression, thus no combustion.
Yes if it is stuck open.
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.
odds are if the valve is stuck open it is either bent(from over rev/valve float), or siezed in the guide(over heating). no easy fix sry
A foot valve is something that you eat with your foot