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
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.
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.
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.
There are several things that can cause your Jeep to stall while idling. The timing may be off or your fuel filter may be clogged.
It is idling to low, it may be in need of a tune up.
2001 sienna stall while just stop while driving. electric just cut out power, then switch can operated but idling roughling
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.
Check for ice buildup. You may need to pre-heat the combustion air before the Propane is mixed.
Could be many reasons such as contaminated fuel (water), could be in need of a tune up, could be a large vacuum leak,
try cleaning the throttlebody and Air Control Valve and clean the bore of the A.C.V. with a mas air flow cleaner you can by at autopart store
Check your spark plugs and leads.
It may be because the idling unit is broken.