Blowing heavy black smoke

[Autumbass91218]

I have a 2006 Jetta tdi 1.9L and it is just blowing black smoke out of the tail pipe. It all started after i changed the turbo because the oil seal was blown out. after that i was told that could be the EGR valve and the injectors so i got a new EGR and got the injectors rebuild and it is still doing the same thing. if anyone has any suggestions for what this could be it would be very helpful.

 

[Rx7145]

Well, black smoke means it’s over fueling so you have too much fuel and not enough air. Does it seem low on power? Did you check the calibration of the turbo?

 

[Autumbass91218]

so it wont rev over 2000rpms and is low on power, but when i put the new turbo in i thought the same thing so i plugged a scanner in and it was reading 30psi of boost. it has an electronic wastegate so i didn't want to mess with it to much and just put it in.

 

[Rx7145]

Read down through this web page.

Turbo stop screw adjustment on TDI engine with zip tie to fix engine hesitation | VW TDI forum, Audi, Porsche, and Chevy Cruze diesel forum

VW and Audi TDI forum, and Chevy Cruze diesel forum

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With your turbo being new, you will be able to adjust the stop screw.

 

[Rx7145]

You’re over boosting and it’s going into limp mode.

 

[sptsailing]

What codes do you find in your VCDS analysis? You do have one, I suppose, otherwise, how can you do anything with these cars?

 

[efeballi]

Black smoke, particularly if it goes away after your car goes into limp mode, is an indication of boost leak. Check the connections from the turbo to the intake manifold.