Q: Bmw misfire

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During cold start the vehicle misfires an smokes until it’s warm Iv changed coil plugs and still does it. Once warm it’s great. Throwing code for cylinder 6 misfire

My car has 191000 miles.
My car has an automatic transmission.

You will need to have the cylinder number 6 compression tested to see if there is low compression in that cylinder? If it is low then have the cylinder pressure tested to see if the valves or piston rings are leaking. You may also want to have the combustion intake cleaned to remove any carbon buildup and see if this helps.

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