Peugeot 206 xrd

Hi, I wanted to let you know that the black smoke is due to a rich fuel mixture, meaning too much fuel and not enough air. Have you changed the air filter? Did you check if the throttle body is opening and closing correctly when you press the accelerator? They often malfunction and prevent air intake, causing the engine to jerk. It could also be that the intake manifold is dirty. I hope this helps.

Yamid: The diesel fuel leaks from somewhere; small drops fall out, and the smell of gasoline is unbearable. It's not that it consumes a lot, but it leaks.
Regards

Thanks, I recently changed the filter and went to several mechanic shops without any luck.

If there are drops of gasoline, it's because there's a leak. They need to check the hoses from the tank and those that run to the engine, all the way to the filler neck. The technician who checked that didn't notice a tiny leak. Sometimes the smell is caused by the fuel cap gasket where the fuel pump is located. It gets damaged or shifts, and when you drive the car, gasoline spills out. This cap is under the back seat. Inspecting it is relatively easy; you just need to lift the back seat and see if there's any moisture around the cap. If there is, take it to a technician to fix the problem, as it requires experience.

Regarding the three-cylinder engine running and the black smoke you mentioned, it's likely that an injector is stuck open, flooding the cylinder and causing it to stop working. That's also why there's black smoke. I think you must also be feeling a loss of power in the vehicle, right? I hope this helps.

If it's losing power, in short, do they just need to check the pistons? Because I just spoke with another mechanic and he says I should get a new engine. I'm getting it out of that shop ASAP!
Regards