I had one do that and it turned out to be the coolant temp sensor next to the thermostat was bad.
By A Chevy
Anywhere from 4 to 8 degrees BTDC / BEFORE TOP DEAD CENTER. Were ever it runs it's best and starts good when hot.
When the engine is in park there isn't as much of a load on it so it will not be as noticeable.
it sounds to me it needs a map sensor
it mayby a plugged fuel filter ,,,,, or the ignition module
Coolant temp sensor
My Chevy truck doesn't stall. It actually runs very good because I take good care of it and do a weekly inspection of fluid levels including the rear axle.
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0 TDC is factory for that engine.But if it has a lot of miles on it, and still runs good. Then set the timing about 4-6 degrees. BTDC ( Before top dead center ) and see how it runs. If it starts hard,Thenslow the timing up a little till you get it just right. It will start good,run good, and not ping. When you get it right.
you shouldn't have to, just reset radio! if car runs funny it will be ok in a few starts.
check the egr vavle or the purge valve
The fault key start is a problem with Chevy caprice's and it starts with the key itself which has a RFID chip and that runs about $35.00 and if that does not work then you have a problem with the transceiver in the steering column and that has to be fix by a professional and it is costly