Engine knock5.9 Cummins.
Jun 16, 2022 at 4:37 PM
Engine knock white and or black smoke under moderate to heavy load
2006 DODGE RAM
DANIEL TROWER
- MEMBER
- 1 POST
- FOLLOW
Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
Advertisement
Hello,
Engine/diesel knock accompanied with white or black smoke usually points towards bad diesel injectors. Possible sticky injector nozzle.
I would suggest to first trying some good quality diesel fuel additive, this could help clean the injectors and possibly reduce/stop the knock and smoke. As the engine only seems to knock under load while driving it will be difficult to establish which cylinder/s is the culprit
Cummins has officially endorsed a fuel additive, recommending two Power Service products, Diesel Kleen + Cetane Boost and Diesel Fuel Supplement + Cetane Boost. See picture below
The Diesel Kleen + Cetane boost is their injector cleaner, available from Amazon and local parts stores.
Please let us know if this helps.
Cheers, Boris
Engine/diesel knock accompanied with white or black smoke usually points towards bad diesel injectors. Possible sticky injector nozzle.
I would suggest to first trying some good quality diesel fuel additive, this could help clean the injectors and possibly reduce/stop the knock and smoke. As the engine only seems to knock under load while driving it will be difficult to establish which cylinder/s is the culprit
Cummins has officially endorsed a fuel additive, recommending two Power Service products, Diesel Kleen + Cetane Boost and Diesel Fuel Supplement + Cetane Boost. See picture below
The Diesel Kleen + Cetane boost is their injector cleaner, available from Amazon and local parts stores.
Please let us know if this helps.
Cheers, Boris
Image (Click to enlarge)
Jun 17, 2022 at 6:50 AM
Advertisement