BMW X6 M e71 2011 : black smoke, may long crank when warm, small irregular vibrations

[kensou]

Hi

No error code for the engine after diagnostic

When cold start , start hardly (with pop and bang lol), smoke a lot (gray/black), gray smoke when full load on roads

Fuel pressure regulator ?
Oxygen sensor tired and reading bad value ?
Injectors to be replaced ?
Air filter ?

https://youtube.com/shorts/5bWVbpVvryQ?feature=share

Thanks for your help
Patrick

[525DA_touring]

I think bad injektors

[kensou]

Originally Posted by 525DA_touring

I think bad injektors

thanks for your reply.
I think so also.
BUt i wanna know others opinions.

because no CEL, no logged error.

Only one time, on a hard throttle on higwhay, after 20 mn of hard drive, i got LIMP mode, et got oxygen sensor voltage value excessive (after cat). and got something like injector issue on cylinder 1.

If injectors are faulty , why i didn't get any error like mixture too rich ?....

[kensou]

Just to confirm that the problem is solved by replacing injectors

[1er_vert]

The top-tier petrol has the best additive packages. Use the cheap stuff and you will see Reduced Power faults... even after ONE USE!