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Your year--make--model didn't post for some reason? That info would be helpful.
If it cranks good but won't start, have a helper crank it while you check for spark at the spark plugs, where applicable. If spark everywhere, use a gage and check proper fuel pressure, also check for fuel injector pulse.
I can only make suggestions, you have to do the testing.
Battery has a full charge? Any applicable trouble codes?
sounds like a fuel problem could be a fuel pump or filter problem you would need to have that checked. other reason for stalling it could be a faulty idle, but with a faulty idle it should still start back up first time.. so would check spark plug leads and plugs. also check for air leaks, its common for the plastic air lines to crack replace with rubber type.
You changed 6 coils, but you didn't change spark plugs? The new coils give strong spark to burn off resisdues from your old plugs plus what ever left inside the combustion due to bad old coils causing smoke and bad ordor. Change all new spark plugs so you can have good ignition to burn off all junks inside combustion chambers. Smokes are at the beginning, but it will go away after less than 10 minutes.
If it is not going away you may have other problemS:
Rich mixture causing engine check light come on.
Check if engine oil level.
Check if your coolant level.
Open the oil cap to see if you have milky stuff. If there is milky stuff then you have bad head gasket.
Let me know what is coming out so others can learn from your experience. Good luck.
Check ASD Relay (Automatic Shut Down) Kills fuel and spark. Computer could be telling it to shut down, but usually Relay is bad. Key Switch could also be bad, get a good manual and a VOM (Volts, Ohms, Milliamps) meter, and make sure you have juice both coming in and going out, in the respective key positions. Jiggle wiring while testing, to check for loose connections