White smoke and loss of power - Diesel Forum

silversvo · 11-14-2009, 02:28 AM

My truck has been blowing white smoke and it happens out of the blue. I cant pin-point a certain time it happens, it just happens and I took it to the dealer and they said nothing is wrong with it. I get it back and it does it to me not long after picking it up. I have 34K miles on it, I have changed the fuel filters and done the newest flash on it. When it happens, it blows a lot of white smoke and it hesistates like a gas motor would be starving for fuel. I was at a dealer in Louisiana a couple days ago and there was an identical truck in the shop like mine and they had the cab off... which means they were pulling the motor. I talked to the mechanic working on it and he said the truck had a bent rod and it started off by blowing white smoke. Has anyone else ever seen this? He also said something about an EGR valve going bad causing this mysterious white smoke and loss of power. Can anyone tell me if this is true or not. I know this shop has repaired two 6.4 motors for bent rods as I saw the block of the first one sitting on the pallet ready to ship.

SVTwannabe · 11-17-2009, 03:26 PM

it could be the EGR, it sounds like coolant is building up in the manifold and then being burned off(white smoke). The coolant plugging up the manifold will cause the truck to seem sluggish, you can have it to the floor and rpms will be super high but no take off, seems like forever to get to 30 from a take off. Take the valve out and check to see if its wet.

ZeroOne · 11-18-2009, 09:10 AM

^^^It could be that... especially if you've ever had a blown radiator and ran out of coolant / overheated. Is your coolant level going down consistently?

Another option is the intercooler condensing water in high humidity or rainy conditions, and then blowing into the intake manifold when you really get on it. If it is this issue, it is TSB 08-25-1

Here is a copy to check out....

kungfu31 · 11-21-2009, 05:17 PM

Had my truck in the dealership the other day for the same issue. They couldn't duplicate it while they were road testing the truck. The mechanic put the truck on diagnostic and actuated the EGR valve and still couldn't duplicate the white smoke. When the mechanic tried to pull the EGR valve out of the mixer to inspect it, he found that it was frozen in the mixer. So they replaced the mixer. So far no issues white the white smoke and hesitation. I've been driving it since trying to get it to do it with no issues so far. But I do see puffs of black smoke coming from the exhaust when I get into the accelerator.

timid1 · 11-21-2009, 05:22 PM

Quote:

Originally Posted by kungfu31

Had my truck in the dealership the other day for the same issue. They couldn't duplicate it while they were road testing the truck. The mechanic put the truck on diagnostic and actuated the EGR valve and still couldn't duplicate the white smoke. When the mechanic tried to pull the EGR valve out of the mixer to inspect it, he found that it was frozen in the mixer. So they replaced the mixer. So far no issues white the white smoke and hesitation. I've been driving it since trying to get it to do it with no issues so far. But I do see puffs of black smoke coming from the exhaust when I get into the accelerator.

Black smoke isn't normal. Our trucks aren't supposed to smoke. I don't have any clue as to why it might be smoking, but it shouldn't be.