2007 volvo d12 black smoke under boost

if it aint smokin something is broken.
Black smoke is what seperates the men from the boys.
does the 07 have dpf?
IF not remove turbo cooler boot from turbo side and piut shop air to the system and check for leaks on the whole system
if you have dpf, your dpf is cracked on the innside, but dont worry about that my dpf on my cummins ram has been cracked for 7 years. not fixing it becuase it runs strong a1nd no problems and plus i like the soot stain on the bumper
5.5mpg isnt bad if you are heavy and on the hammer all the time. nobody knows your driving habits. start with intake leaks. sounds like you might have one

 

i run pre egr, but my buddy blocked off his egrs in both his trucks and made a world of difference in everything. could be a number of things with the smoke but givin the mileage i would say you are doing fantastic with the motor. get some pvc from home depot and put a air fitting in it and clamp it to your cac boot on turbo side. Leave everything else hooked up. You should only need about 5 pounds of shop air. Dont put too much into it becuase you will blow the fitting out of the boot. IF you have an air leak good enough to cuase black smoke, you will hear it pissing out where the leak is without spraying everything down with soap

 

This website will delete the thread if i discuss how to do emissions deletes on here. so that has to be kept private. I dont want your thread to get deleted

 

It will also smoke if the computer doesn't no where top dead center is. If it has a two wire crankshaft sensor it is probably dirty and needs cleaned . Leave the shim out if it doesnt touch relutor wheel. Also try unplugging intake sensor and see how it runs.

 

I use a magnet to pull the shavings from the hole.

 

Age is probably sticking. I have an 05 670 d12 465 volvo 1.5 mil. On it 5.5 to 6.2 mpg never smokes. The epg that controls the exhaust shudder might be sticking. Closed it has 2 functions one is to be used as an exhaust brake and second is as a backpressure device to increase exhaust to the egr valves. The "twins" as I have read are very problematic.

 

A freeze plug in front of the valvecover pipe might fix it?