tiguan 1.4 tsi strange black smoke

[gccb21]

hi git a strange problem with tiguan 1.4 tsi, car sometimes run fine and other start smoking black and misfiring.
can someone guide me

[MSAUTOALGERIA]

Hi,
black smoke mean you have poor air flow, check leaks

[gccb21]

Black smoke at idle.sometimes theowing smoke sometimes no

[pawl]

too much fuel not enough air

[fuzz1]

Hi
I would have first scanned for codes

Then view live data. Live data will give you an idea what is happening and what is outside limits