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Cant get rid of black smoke!
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=3&t=89264		 Page 1 of 1
Author:  ukedem [ Thu Sep 20, 2018 12:50 pm ]
Post subject:  Cant get rid of black smoke!
Hello all!

2003 Jeep Cherokee/Liberty 2.8 CDR KJ

I noticed my car was spewing a lot more black smoke than usual about 2 months ago... since then I have done the following work on the car;

Installed the Samco hoses.
Changed the air filter
Replaced the fuel filter assembly.
Changed the injectors (all 4 were pretty bad).
Changed the vent valve on top of the engine.
Removed the EGR valve but not the exhaust? cylinder attached to it.

Dont think I have forgotten anything :)

Anyway, since then my turbo has decided to go bad on me (bad screeching noise and white smoke) and I'm still noticing quite a bit of black smoke
when accelerating.... it has only been a few days since i changed the injectors and I'm wondering if the black smoke will reduce in time or when I replace the turbo?
New turbo is arriving next week and honestly I'm praying it will make qa difference... all this has just about ruined me!

Any suggestions or advice will be greatly appreciated!

Elias
Author:  WWDiesel [ Thu Sep 20, 2018 3:36 pm ]
Post subject:  Re: Cant get rid of black smoke!
ukedem wrote:
Hello all!
2003 Jeep Cherokee/Liberty 2.8 CDR KJ
I noticed my car was spewing a lot more black smoke than usual about 2 months ago... since then I have done the following work on the car;
Installed the Samco hoses.
Changed the air filter
Replaced the fuel filter assembly.
Changed the injectors (all 4 were pretty bad).
Changed the vent valve on top of the engine.
Removed the EGR valve but not the exhaust? cylinder attached to it.
Dont think I have forgotten anything :)
Anyway, since then my turbo has decided to go bad on me (bad screeching noise and white smoke) and I'm still noticing quite a bit of black smoke
when accelerating.... it has only been a few days since i changed the injectors and I'm wondering if the black smoke will reduce in time or when I replace the turbo?
New turbo is arriving next week and honestly I'm praying it will make a difference... all this has just about ruined me!
Any suggestions or advice will be greatly appreciated!
Elias

A bad turbo would cause low boost issues which in turn will cause low power and produce lots of black smoke which is basically unburned fuel.
Also, have you ever cleaned or replaced the MAP sensor? If not, you might want to try a new one as a bad MAP sensor can cause multiple issues including low boost.
If the turbo "rattling" or going bad as you stated? I would not recommend that you keep driving the vehicle as the risks could be catastrophic. :grim:
Author:  ukedem [ Thu Sep 20, 2018 4:54 pm ]
Post subject:  Re: Cant get rid of black smoke!
Thx a lot for the reply WWdeisel!

I knew I forgot to write something... I actually did clean the MAP sensor :)

So you think my problem could be solved once the new turbo is installed? Ive noticed the black smoke is a bit less now
but there is now also intermittent white smoke so I'm assuming that is from the turbo too.

You asked about what the turbo is doing... it is not rattling but there is a screech/whine coming from it that is getting worse day by day. Is it dangerous to
drive it like this for a few more days??

You are right about the boost, its definitely noticeable (the lack of it i mean)
Author:  rancherman [ Thu Sep 20, 2018 5:31 pm ]
Post subject:  Re: Cant get rid of black smoke!
The occasional white smoke is probably coming from a nearly toasted turbo. Loose shaft eats up the seals pretty quick, and blam. oil finds it's way into the exhaust stream, or intake, or both.
I'd say your symptoms are all turbo related.

'drive a few more days'??? Personally, I wouldn't run it more than to move it a short distance.
Chances of it grenading and loading the whole intercooler and intake with shrapnel are always a possibility, but more probable is running the engine out of oil.. a total seal failure will empty the pan in very short order.

A loose shaft means impellors are getting ground away too. Just because we can't feel the interference when we wiggle it by hand, doesn't mean contact hasn't happened. It's already ate away a little bit. (quite possible the 'screeching' you are hearing) This fine powder doesn't belong in an intake manifold either.
Author:  ukedem [ Thu Sep 20, 2018 6:13 pm ]
Post subject:  Re: Cant get rid of black smoke!
rancherman wrote:
The occasional white smoke is probably coming from a nearly toasted turbo. Loose shaft eats up the seals pretty quick, and blam. oil finds it's way into the exhaust stream, or intake, or both.
I'd say your symptoms are all turbo related.

'drive a few more days'??? Personally, I wouldn't run it more than to move it a short distance.
Chances of it grenading and loading the whole intercooler and intake with shrapnel are always a possibility, but more probable is running the engine out of oil.. a total seal failure will empty the pan in very short order.

A loose shaft means impellors are getting ground away too. Just because we can't feel the interference when we wiggle it by hand, doesn't mean contact hasn't happened. It's already ate away a little bit. (quite possible the 'screeching' you are hearing) This fine powder doesn't belong in an intake manifold either.



Ok, that scared me enough to let it sit until the new turbo arrives! :)

Thx a lot for the advice and for taking the time to reply!
Author:  rancherman [ Fri Sep 21, 2018 10:01 am ]
Post subject:  Re: Cant get rid of black smoke!
Use these days by preparing the old turbo for removal; squirting all the mounting hardware with some nut buster. I like Kroil, PB Blaster is good too.
Kroil is harder to find, and more expensive.. PB Blaster can be found even in Walmart.
Author:  WWDiesel [ Fri Sep 21, 2018 10:38 am ]
Post subject:  Re: Cant get rid of black smoke!
ukedem wrote:
Ok, that scared me enough to let it sit until the new turbo arrives! :)
Thx a lot for the advice and for taking the time to reply!

A very wise decision!

As rancherman stated, get everything soaked up real good with a good penetrating oil. :wink:
Author:  flatscat1 [ Sat Sep 22, 2018 12:22 pm ]
Post subject:  Re: Cant get rid of black smoke!
I went through the exact same thing only to find out my mechanic installed a long screw which punctured a small hole in my plastic air cooler. I patched with J&B plastic weld over a year ago.
Author:  ukedem [ Sat Sep 22, 2018 1:45 pm ]
Post subject:  Re: Cant get rid of black smoke!
flatscat1 wrote:
I went through the exact same thing only to find out my mechanic installed a long screw which punctured a small hole in my plastic air cooler. I patched with J&B plastic weld over a year ago.



Hang on, we have an air cooler? lol
Author:  ukedem [ Fri Sep 28, 2018 12:40 pm ]
Post subject:  Re: Cant get rid of black smoke!
Well the turbo has been changed... we started the car for the first time about half an hour ago and
it was spewing white/grey smoke again.
The mechanic said it will need driving a bit for the smoke to clear because there will be oil in the exhaust
from the faulty turbo... is that true??
Author:  WolverineFW [ Fri Sep 28, 2018 1:45 pm ]
Post subject:  Re: Cant get rid of black smoke!
Quite possibly true.
ukedem wrote:
Well the turbo has been changed... we started the car for the first time about half an hour ago and
it was spewing white/grey smoke again.
The mechanic said it will need driving a bit for the smoke to clear because there will be oil in the exhaust
from the faulty turbo... is that true??


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Author:  GordnadoCRD [ Sat Sep 29, 2018 6:58 pm ]
Post subject:  Re: Cant get rid of black smoke!
Even after replacing the Cat and the Muffler, it still took around 10 miles for mine to clean out, and it fogged out every mosquito from Klamath Falls to the California state line.

But it did finally clean up.
Author:  ukedem [ Sun Sep 30, 2018 12:40 am ]
Post subject:  Re: Cant get rid of black smoke!
GordnadoCRD wrote:
Even after replacing the Cat and the Muffler, it still took around 10 miles for mine to clean out, and it fogged out every mosquito from Klamath Falls to the California state line.

But it did finally clean up.



Absolutely correct, I'm finally smoke free!!! Took about 20 mins of freeway travel but now im back to the acceptable level of smoke expected from the crd under acceleration :)

Thank you all very much for your advice and input!
Author:  musiclady420 [ Sun Sep 30, 2018 10:57 pm ]
Post subject:  Re: Cant get rid of black smoke!
My husband said to check for a leak in the intercooler. We had this problem and it went away once we changed the intercooler.

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Author:  rhyanb12 [ Mon Nov 12, 2018 2:21 am ]
Post subject:  Re: Cant get rid of black smoke!
Leaking intercooler hose is a common issue.
Author:  ukedem [ Mon Nov 12, 2018 1:50 pm ]
Post subject:  Re: Cant get rid of black smoke!
Believe it or not, even though I thought I had finished, I was not smoke free after all!

I will post a detailed update of what we found, what was done etc as soon as im done putting the engine back together lol!
Author:  WWDiesel [ Mon Nov 12, 2018 2:52 pm ]
Post subject:  Re: Cant get rid of black smoke!
ukedem wrote:
Believe it or not, even though I thought I had finished, I was not smoke free after all!

I will post a detailed update of what we found, what was done etc as soon as im done putting the engine back together lol!


:POPCORN:
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