Your engine will probably missfire and you will not have compression in the cylinder that has the broken valve spring because your valve will stay open.
A faulty or clogged egr valve can cause an engine to run rough. If stuck or clogged the valve can be cleaned after removal with carburetor cleaner.
Yes, if it leaks oil through and on to the spark plugs, it will foul them and cause a missfire.
a stuck valve or bad plug or plug wire, or bad cap and rotor to include a cracked or missing vacum hose will make any engine miss.
The carburretor float valve is stuck open or the float is punctured/stuck down.
Pluged fuel Filter, line. Needle valve could be stuck. pluged up jets.
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.
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.
engine misses could be bad plugs,incorrect ignition timing, cracked distributor cap, bad wires, vacuum leak, clogged fuel injector or filter, . engine backfires could be ignition timming, vacuum leak, EGR system not working, bad valves or valve springs.
It should be towards the passenger side of the engine stuck in the valve cover.
Depending on how it failed, it usually is one of two different symptoms. Both will turn on the check engine light, and store a code. If the valve fails in the stuck open position, the engine will run rough and not idle correctly. If the valve fails in the closed postition, the engine will run normally and cause any driveability related problems.
Yes if the vehicle is equiped with coil/coils and will cause missfire, oil there means your valve cover gasket is shot and if this is the case the plugs maybe be fouled. But generally you should seek diagnosis from a professional the vehicle may have other issues depending on the type of stall