Black smoke
04-08-2011, 07:49 PM
#11
Where on earth do you get your information?
I have personally had a turbo blow on me, and it most definitly can allow oil into the exhaust and did not cause a runaway engine condition. When mine blew, it put out enough thick black smoke to blot out the noon sun in Laredo, Texas - it looked like a storm cloud rolling in.
And computerized or non computerized diesels dont matter - if the turbo blows in a way that allows oil to blow into the air intake, its going to run away on you. The only way to stop it is to clog the air intake.
Also, have you ever SEEN what motor oil does at -25 F (Especially heavy weight diesel motor oil)? Its thicker than tar. There is a reason why diesel trucks all have block heaters.
And yes, I didn't go into enough detail apparently. According to Ford, the ambient air temperature was extremely cold - below -25 F. The driver started the truck, and immediately put a heavy load on the engine. The turbo seal broke (Or SOMETHING broke), and allowed oil into the exhaust system. This wasn't a big deal immediately - however, the DPF system eventually went into a regen cycle, which ignited the oil that was trapped in the diesel particulate filter, and caused flames to shoot out the exhaust.
Ford's fix to prevent the flame thrower was to shut down the DPF cycle if it detected abnormally high temperatures in the system and de-rate the truck to the point it would have to be towed to the dealer for repair.
I have personally had a turbo blow on me, and it most definitly can allow oil into the exhaust and did not cause a runaway engine condition. When mine blew, it put out enough thick black smoke to blot out the noon sun in Laredo, Texas - it looked like a storm cloud rolling in.
And computerized or non computerized diesels dont matter - if the turbo blows in a way that allows oil to blow into the air intake, its going to run away on you. The only way to stop it is to clog the air intake.
Also, have you ever SEEN what motor oil does at -25 F (Especially heavy weight diesel motor oil)? Its thicker than tar. There is a reason why diesel trucks all have block heaters.
And yes, I didn't go into enough detail apparently. According to Ford, the ambient air temperature was extremely cold - below -25 F. The driver started the truck, and immediately put a heavy load on the engine. The turbo seal broke (Or SOMETHING broke), and allowed oil into the exhaust system. This wasn't a big deal immediately - however, the DPF system eventually went into a regen cycle, which ignited the oil that was trapped in the diesel particulate filter, and caused flames to shoot out the exhaust.
Ford's fix to prevent the flame thrower was to shut down the DPF cycle if it detected abnormally high temperatures in the system and de-rate the truck to the point it would have to be towed to the dealer for repair.
04-08-2011, 08:22 PM
#12
Member
Thread Starter
The funny thing is... The new diesel don't put out any smoke anymore.... Well not that I seen anyway. But my new gas powered ecoboost smokes on start up 
and yeah I do hear alot of turbo sound during the first 10 sec on a cold start.
and yeah I do hear alot of turbo sound during the first 10 sec on a cold start.
04-08-2011, 11:29 PM
#13
Senior Member
Ok,what happened to the 2008 PowerStroke? I wasn't there, and I read it on the internet - and I'm not about to say that everything I see on the internet is true. I will say that I would find a failed turbocharger pouring oil into the exhaust a lot more believable than an electrical malfunction in the regen system. I would actually be very happy to hear more information on this.
I will say it is completely possible to fail a turbo charger by putting an extreme load on it at an extremely cold temperature without allowing the oil to warm up - OK, that may not be what happened to the PowerStroke, but it's still possible. It's most definitely possible on a big rig - the turbo charger on a semi is well above the oil pan, and all of the oil will drain back out of it over night. Drivers are trained to let the trucks warm up to at least 100 F before driving them to prevent issues like this.
And you can most definitely fail a turbo in such a way that oil is poured into the exhaust instead of the air intake - I've seen that more times than I can count.
If you are still going to say I'm wrong, and that you can't possibly fail the seal on a diesel truck's turbocharger by not letting it warm up before driving, or that you can't fail the turbo in a way that makes oil go into the exhaust - well, we will just have to agree to disagree.
And toolmanw, one of the guys I work with said the same thing --- 'so we spent all this money to clean up the diesel trucks and now they're letting the gas burners get away with it'
I will say it is completely possible to fail a turbo charger by putting an extreme load on it at an extremely cold temperature without allowing the oil to warm up - OK, that may not be what happened to the PowerStroke, but it's still possible. It's most definitely possible on a big rig - the turbo charger on a semi is well above the oil pan, and all of the oil will drain back out of it over night. Drivers are trained to let the trucks warm up to at least 100 F before driving them to prevent issues like this.
And you can most definitely fail a turbo in such a way that oil is poured into the exhaust instead of the air intake - I've seen that more times than I can count.
If you are still going to say I'm wrong, and that you can't possibly fail the seal on a diesel truck's turbocharger by not letting it warm up before driving, or that you can't fail the turbo in a way that makes oil go into the exhaust - well, we will just have to agree to disagree.
And toolmanw, one of the guys I work with said the same thing --- 'so we spent all this money to clean up the diesel trucks and now they're letting the gas burners get away with it'
10-06-2011, 02:30 AM
#15
Member
Someone posted a thread on this a few days ago. I never noticed it until I read his thread. The next morning I looked and I indeed did get some black smoke for about 10 seconds. I also heard something that I never noticed before, and during that 10 seconds or so I could hear the turbos spool up significantly. Did some reading and found that is in the design; to get the turbos moving and warmed up quickly. It's interesting because the idle doesn't get any higher, it's just shoving some extra fuel to get em moving. At least that's how I interpret it.
Here is a small section of an article I found about the ecoboost that was written a couple years ago. It did not state that this was specifically the F-150 spec engine, but all things being equal this might explain why we are seeing some soot around the tail pipe ends when it's cold out and the engine is cold:
As said above, it appears they are making a rich mixture for quick warm up and smooth running when cold. Normal for a rich mixture when cold, but a strange approach to me. Kind of sucks actually. Seems the best thing to do is get in it and drive vs letting it idle and warm up. Not suggesting it gets hammered on until the oil temps are up to snuff, but drive it nicely while it warms.
Here is a small section of an article I found about the ecoboost that was written a couple years ago. It did not state that this was specifically the F-150 spec engine, but all things being equal this might explain why we are seeing some soot around the tail pipe ends when it's cold out and the engine is cold:
As said above, it appears they are making a rich mixture for quick warm up and smooth running when cold. Normal for a rich mixture when cold, but a strange approach to me. Kind of sucks actually. Seems the best thing to do is get in it and drive vs letting it idle and warm up. Not suggesting it gets hammered on until the oil temps are up to snuff, but drive it nicely while it warms.
Overall I would say that this fancy injection strategy should not make the vehicle smoke black. That seems like another problem in itself (or maybee not a problem at all?) My truck does put out alot of white smoke on cold start up however the lowest temp's mine has seen yet is only 5 degree's Celsius. Hope this helps?
10-06-2011, 04:24 AM
#16
Senior Member
The colder outside on first start up the more pronounced it is.
Truck starts and puffs some black.
Seconds later you hear the turbos spinning up but the motor rpm stays stable.
Exhaust turns to white steam.
Few more seconds and you hear turbos winding down.
Truck fast idles while warming up.
Nothing to worry about, all normal.
Truck starts and puffs some black.
Seconds later you hear the turbos spinning up but the motor rpm stays stable.
Exhaust turns to white steam.
Few more seconds and you hear turbos winding down.
Truck fast idles while warming up.
Nothing to worry about, all normal.