Random black smoke stock truck
 

Hey guys so the other day I noticed a cloud of black smoke behind me while I'm driving on the highway it lasts about 10 seconds and goes away for 20 or so miles. Seems like if I'm idling for awhile and I get on it it just dumps black smoke. It has a tiny surge to it when it happens. BTW truck is all stock and is an 07 6.7 megacab drw.

I just changed the oil, fuel, and air filter also cleaned the MAF and did a ccv delete.

Probly just that dpf cleaning out once in awhile.

Here is a video... its smoking a LOT now..

http://s230.photobucket.com/user/tgillil/media/VID_20130714_144241_848.mp4.html

You may have an issue with the dpf system, you need to get that looked at.
It may be plugged, needs removed and baked out.
When was the last time the dpf went through a regen cycle?
as for the surge, it sounds like the dpf system may be full and about to put the motor into a limp mode.

Can you undo the CCV delete and see if it goes away? How many miles are on the truck?

I've never seen it go into a regen. Its never had any kind of warnings or anything. I plan on getting a new ccv filter and change it back. The truck has 185k on it.

Sounds like a cracked dpf my buddies kinda did this

That's what I'm thinking. But why does a crack cause it to have lots of smoke?

Because the fuel injected into the dpf is getting past the filtering material. But if you've never noticed the dpf doing a regen, i'm willing to say the filter needs cleaned or the filter is shot.
You should also think about a dpf delete,depending on the emmisions regs in your county and state.

That's what I figured. I'm in Alabama so no emissions. I already ordered an egr and dpf delete with a Smarty Jr tuner. Hoping it will fix it so I can start loving my truck again.

You will deffinetaly want to remove dpf and cat if your getting a tuner.

Since about a year after I bought my truck (2008 6.7) it has been 'whispering' out black smoke going down the highway. Went to the dealer numerous times to no avail because they couldn't replicate it. So a few weeks ago, (90,000 miles later) it started rolling some serious smoke out the tail pipe. Went back to the dealer and showed him the video I made of it smoking and he said it was the EGR butterfly hanging up and choking off the air. Also, when I told the tech that the truck had never been in regen (the honest truth) he went back in the shop and came back 20 minutes later. He said it was because I had a cracked DPF and the exhaust was bypassing the element, not allowing the ECM to see enough of a pressure differential to put it into regen. At the techs advice, I went and got a EGR/DPF delete with tuner and now I have no smoke and have been averaging 5+ more mpg's.

Here is a little update. After about 1700 miles the see dealer warning came back on and all random smoking stopped. I hooked up a code reader no codes, but cleared anyways, see dealer light went off and smoking started again. I then removed the egr valve and and butterfly cleaned the massive amounts of soot out and still smoked:argh:. So I unplugged it, no smoke, no cel, and no dealer warning. Drove 50 miles ran like a champ mpg shot up to 21mpg and intake temp dropped to below 80 degrees. Hopefully it stays like this till I get time to get all the dpf and egr delete on.

EGR = abbreviation for #%*£¥$&@!

Shouldn't I get a cel with the egr valve unplugged?

with out a tuner yes

I'd I don't think the truck has a tune maybe it does cause when you hook a scanner up it says egr disabled.

Hi Robinrubi,

what scanner are you using?

Mac tools scanner. Here is an update. Turns out the truck has some type of stealth delete kit. the factory dpf is hollow, so to check I unplugged all my egt sensors, and all 3 egr plugs and have been code free for 3 days. I'll post a couple pictures of the hollow dpf.