yes a bad converter will make car stall
If it is a car with multiple coils, the easiest way it to swap coils with another cylinder. it the fault moves to the other cylinder, the coil is bad.
First of all, the engine will not run on one cylinder ... chances are the computer is correct - try replacing the two coils.
Yes.
yes
yes
yes
Replace the springs with "towing" cargo coils
no if the car doesnt start check the battery and the alternator and the starter.
This car has 2 coils 1 for r/ and one for l/ banks .to determine which one is failing .simply disconnect both and plug in 1 at a time.when the engine starts the opposing coil is bad .just had this happen to me .if you drive with this condition there is potential to damage the cat convertors.
Bad fuel pump.
Yes. I have had to replace tensioners for this reason.