i just took off

[Ashenslinky]

but why is there this kinda black smoke coming out of the ab,  yesterday i flew the jf-17 and the smoke was white when i was in high altitude
even with ab off i still see black smoke, there are no warning panels, 

[razo+r]

That's a characteristic of the engine.

Google MiG-29 (has almost the exact same engine) and you'll see it smoke too.

At high altitudes you'll get contrails.

Edited March 24, 2022 by razo+r