White Smoke
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From: Florida
White Smoke
Truck is running great other than my white smoke problem.
The truck bucks a little and runs rough for a few seconds(as if it can't get the exhaust gases out) then white smoke pours out of the exhaust pipe. This happens only when I slow down(letting off the pedal) and then get back onto the pedal after about an hour long ride at highway speeds. It happens loaded and without a load. For example, getting off the highway and then taking off again at the end of the off ramp. After it finishes it's smoke fit the truck runs great again. Anyone experienced this problem or has any ideas what it could be? I talked with the service manager at my dealer and he mentioned something about an exhaust sensor.
The truck bucks a little and runs rough for a few seconds(as if it can't get the exhaust gases out) then white smoke pours out of the exhaust pipe. This happens only when I slow down(letting off the pedal) and then get back onto the pedal after about an hour long ride at highway speeds. It happens loaded and without a load. For example, getting off the highway and then taking off again at the end of the off ramp. After it finishes it's smoke fit the truck runs great again. Anyone experienced this problem or has any ideas what it could be? I talked with the service manager at my dealer and he mentioned something about an exhaust sensor.
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From: Isanti, MN
Super Moderator
Joined: Aug 2003
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From: Isanti, MN
There have been some who have had their CAC replaced under the TSB and have still seen some white smoke. Most say that it's less than before having it replaced, apparently there's no good way to completely prevent water from accumulating in the CAC.
While I'm thinking of it, how's your coolant level on the affected trucks?
While I'm thinking of it, how's your coolant level on the affected trucks?
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Joined: Aug 2010
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From: florida
I have a 2010 and mine did it after sitting all night during rain storms and in FL humidity, DPF/CAT delete and tuned no more white smoke or problems
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From: Florida
There all good. Never had a leak of any kind. I am a total stickler for maintenance and keep up with everything. I use a fuel additive at every fill up and the trucks all get worked hard.
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From: Frederick, MD
You could just take the lower hose off of the cac and drain the water off till you get it in for a replacement.
I was down there the most of July for vacation...it is a humid place.
I was down there the most of July for vacation...it is a humid place.
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From: Isanti, MN
This has been tried before and I haven't heard anyone have any success at preventing the white smoke.
Remember, the water doesn't form in the CAC when the truck sits, it happens when it runs. Then as soon as you see high boost it gets blown out of there, so the only way you're going to get a measurable amount of water out of there is if you have a long stretch with no boost and then stop the truck without hitting the accelerator pedal. And then all you're going to get out is what would have simply gone through the engine if you hit the pedal.
Draining before driving won't solve anything because it won't affect the water that builds up while cruising.
Remember, the water doesn't form in the CAC when the truck sits, it happens when it runs. Then as soon as you see high boost it gets blown out of there, so the only way you're going to get a measurable amount of water out of there is if you have a long stretch with no boost and then stop the truck without hitting the accelerator pedal. And then all you're going to get out is what would have simply gone through the engine if you hit the pedal.
Draining before driving won't solve anything because it won't affect the water that builds up while cruising.
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Hmmm...speaking-o-moisture, I was working on my buddy's '08 F350 today and we couldn't believe the amount of run-off we got we drained the CCV bypass catch can. While neither one of us has had the white smoke issue that's a whole lot of moisture that didn't have the chance to accumulate in the intercooler tract in the first place. It's been quite wet up from an accumulation and humidity standpoint too, but with our tuning and "driving style" there's usually ample occasion for higher boost levels anyway...
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From: Florida
All of this information has forced me to ask the dumb question of the day, Is there nothing we can do about this? Is moisture accumulation just a fact of the 6.4? Can it be prevented by something other than tuning?
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I'm pretty sure the CCV mod on my truck and my buddy's has something to do with not experiencing the issue. Some people upgraded their intercoolers (aFe, Spearco, etc.) which fixed the problem too and IIRC no one's had the problem with an upgraded intercooler...