A bad EGR valve should not cause the engine to not start. There is most likely another problem that is causing the engine to not start.
A 2007 Chevy Optra may stop running and then restart due to several potential issues, such as a failing fuel pump, a clogged fuel filter, or an electrical problem like a weak battery or faulty ignition system. Additionally, issues with the engine's sensors, such as the crankshaft or camshaft position sensors, could cause intermittent stalling. Overheating due to cooling system failures could also lead to the engine shutting down temporarily. It's advisable to have the vehicle diagnosed by a professional mechanic to pinpoint the exact cause.
It could keep the engine from running, but not the valves from moving.
A very plugged up fuel filter could do that.
If you are sure the engine is not running hot then it could be a bad coolant temp sender.
It could be low on water and stuff, fill it.
Vacuum leak?
A trained ear could here them while the engine is running. The only way to know for sure is to tear the engine down and check them with a mike.
the choke could be sticking causing the car the flood
Chevy it could be a 301 oldsmobile engine or a Chevy 289 and ford it would be a 302 boss engine
No
Yes, it could.
it could be of running it with out oil.