exhaust smoke while driving
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Originally Posted by AlbyVA
So what you are saying, is that if you see Black Smoke, the DPF is broken and whomever should get it fixed ASAP since its most likely still under warranty?
But those with White Smoke are fine? As I read, it seems like White Smoke is normal, its just a regen that isn't regen'ing at the right temp? But nothing terrible is happening?
But those with White Smoke are fine? As I read, it seems like White Smoke is normal, its just a regen that isn't regen'ing at the right temp? But nothing terrible is happening?
You are correct. The dpf is there to remove ALL black smoke. White smoke is raw hydrocarbons (fuel). Ever see a semi fire up in really cold weather? It will puke white smoke until the engine is warm enough to burn all the fuel that is being injected. The same theory is true when a regen is initiated. When the DOC is too cold to burn all that is being injected into it, the unburnt fuel escapes as white smoke.
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Originally Posted by rob_nc
You are correct. The dpf is there to remove ALL black smoke. White smoke is raw hydrocarbons (fuel). Ever see a semi fire up in really cold weather? It will puke white smoke until the engine is warm enough to burn all the fuel that is being injected. The same theory is true when a regen is initiated. When the DOC is too cold to burn all that is being injected into it, the unburnt fuel escapes as white smoke.
BTW as reported if you back off the throttle, it fixes itself, but I've also tried hitting the throttle harder to see what happens and often times that too will seems to fix it. It's almost like the transimssion finds the right gear, the engine RPMs hop up, and voila, no more smoke.
Any thoughts on how this can be?
Last edited by Zeplik; Nov 29, 2007 at 09:43 PM.
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Originally Posted by fordfish
AlbyVA, looking at your recorded mpg's you are filling up weekly and getting 10-12 ish I'd say you do alot of intown driving, me too, this seems to create alot of regen burns, I think you are just seeing DFP crap exit the tail pipes.
Yup. You are correct. The majority of my driving is local intown.
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