It sounds like fuel starved. Try the fuel filter or the fuel pump.
Could be in need of a tune up Could have moisture inside the distributor cap Could be in need of a carburetor rebuild
Yes.
The chain can not backfire. If it is installed off time it can cause a backfire, which could conceivably damage a starter.
could be a bad plug
could be a bad battery wire
Yes it would.
engine backfire during cranking.
No
timing is off or firing order is off
Out of time, or spark plug wires installed on wrong plug.
There are multiple things that could cause this, your best bet it to take it to a mechanic and let them check it out.
Try replacing the fuel filter. if you have 50,000+ miles on the car, and your fuel filter hasn't been replaced, that could cause your car to sputter, backfire, and race while it's idleing. your sending unit in the gas tank could also be going bad, but i'd try replacing the fuel filter first, it's way cheaper and easier than dropping a gas tank and then finding out that wasn't the problem.