See full version: Engine Stalling Problems; Possible Causes; What To Check And Why
Idle speed on a fuel injected engine is controlled by; allowing a small amount of air to bypass the throttle. The most common failure is partial/complete jamming of the actuator (due to dirt/dust or even oil). The result is that it, cannot be smoothly controlled.
Locating Engine Vacuum Leaks here
Ignition misfires can make any engine stall at idle. When misfiring occurs your engine will run slower than normal. So, a bad misfire may cause it to stall.
If the engine stalls while idling or driving, the engine may be running out of fuel. This could be from not receiving enough fuel pressure to keep it running. The most likely cause of this kind of stalling would be, a fuel pump that is not spinning fast enough; or is intermittently cutting out. If the vehicle is more than seven or eight years old the fuel pump would certainly be suspect. But, as with the idle speed control circuit; don’t replace anything until you’ve run some diagnostic tests. here
Think your going to need to have the motor scanned for codes.
Second, why haven't you corrected the over-fill of oil here
Third, look at your fuel system
Third, look at your fuel system here
If the timing belt or chain skips a tooth or more, the engine can and often does stall. The top end of the engine doesn’t turn in time with the bottom end. This can cause the engine not only to stall, but can cause internal engine damage in some cases. here
Whether it is a fuel quality issue or a fuel supply or fuel injector issue, the fuel system can be the cause of your car stalling. Three things from the fuel system can cause your engine to stall: bad fuel, too little fuel, and too much fuel.
If the engine is over-fuelling, that can cause it to stall. More commonly known as flooding, over-fuelling wets the spark plugs and they aren’t able to ignite the fuel in the cylinder. It causes a misfire that can cause the engine to stall. Faulty fuel injectors, and bad timing can cause over-fuelling. more
You trust your car. You may not think about it, but you believe that certain functions will occur without fail. You may be aware of little annoyances or issues, but you trust that when you start your car, you will be able to drive to your destination and turn the ignition off until you are ready to drive again.
Closely related to the fuel system is engine timing. A timing belt or chain synchronizes the different parts of the engine so it can run efficiently and properly. Many modern engine systems incorporate variable valve timing to optimize fuel efficiency and power production. If the variable valve timing is incorrect, it can cause the engine to stall from over-fuelling or starving the engine of gas. more
Most people know that your car’s engine needs oil to run properly. But what if you add too much oil into your car’s engine? What happens then?
How Much Oil Should You Put In Your Car? Each engine is different but in general the larger the displacement of your engine the more it will take to keep it properly lubricated. My small 4 cylinder engine takes 5 quarts of oil to properly fill it up after an oil change. If you have a large displacement V8 then your engine may take 8 or more quarts to fill it up to the proper level.
If your engine is overfilled with engine oil you’d want to drain the excess engine oil to the correct oil level for your engine. All cars will come with an oil drain plug that is used to drain old oil that then allows the engine to be filled with new engine oil. here