Could be many reasons such as contaminated fuel (water), could be in need of a tune up, could be a large vacuum leak,
There are various reasons why your car would almost stall when idling. In most cases, this might be an indication of the engine lacking power or capacity due to the failure of the pistons. You should contact a mechanic to diagnose the problem.
If its a turbo car it will stall if the blow off valve is not shutting properly as the pressure drop is too much for the engine to keep turning, same with lpg when you idle the pressure in the engine drops and it will stall you can correct this by changing the timing
It is idling. This is hard for an engine to do smoothly.
You may need to adjust the throtle or idle of the car. In older cars this is as simple as tightening a cable. So when the car is just idling it will naturally rev higher and not stall.
A car that is stopped with the engine running.
Your Dodge Durango may stall when idling at a stop light for a couple of reason. One reason may be that a part needs to be replaced on the car.
A failing throttle position sensor will cause idling problems when the car is warm. The failing sensor can also cause the car to stall when idling.
The #1 cause of cold air from the heater when the car is stopped, or the engine is idling, low engine coolant levels.
Check for vaccuum leaks this could be your problem.
If the oil is low in your car, it can eventually cause your car to stall and not start. It can also kill your engine.
i had this happen before. it was before i cleaned out the lower intake manifold. car was running too rich and not getting enough air. when i turned the steering it would put stress on the engine when idling and then stall.
If the car is starving for fuel or air (low power at idle), the car will stall while turning.