DPF, smoking at highway speeds

d281833 · Aug 21, 2016

Idling kills these things, just sayin'...

Greennationindustries · Jan 6, 2021

Heavyd said: ↑

During a proper regen the aftertreatment injector, or doser, injects fuel into the exhaust after the turbo. This injected fuel reacts with the DOC by a catalytic reaction to burn and create high exhaust temps that bake off the collected soot in the DPF. When the DOC loses its efficiency, it can't complete that catalytic reaction and that injected fuel doesn't burn and escapes out the exhaust as smoke. So basically smoking during a regen means the DOC is not working efficiently. The DOC could be plugged, dirty, or simply worn out and needs replacement. A faulty injector could also be to blame due to improper spray pattern or volume. First step is to remove and clean, (or just replace) the doser injector. Then if the DOC and DPF has not been cleaned in a while, they should be removed and cleaned. Cleaning is a 50/50 thing in your case. Usually once a regen starts to produce smoke, it means the DOC is worn out and needs replacement.
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Greennationindustries · Jan 6, 2021

What color is the smoke when the catalytic injection is not working properly.
Im having this problem and I'm getting alot of white smoke.

Heavyd · Jan 9, 2021

White to light grey.

Greennationindustries · Jan 9, 2021

White smoke.. I just figured it out though.. it was the catalytic injection.
Thanks though

RRA · May 25, 2023

ZhenyaP1991 said: ↑

They have replaced some kind of a clamp and now it does proper regen and doesnt smoke.
Click to expand...

Which clamp is it?

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