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Joe E.
Dodge Dakota
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9/05/2003
13:30:23
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 Subject: major carbon buildup in exhaust..
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Message:
alright I need some advice. My 1990 V6 is blowin out carbon like crazy. About a month ago it sat for a couple weeks with no running. It seemed fine befire this. I started having problems with power and emission. The engine seems to be bogged down. On the highway, it has way less ability to hold a higher speed without changing gear all the time. I use to be good going 85 mph, just crusin. Now sometimes at even 65mph it is struggelin. I got a new O2 sensor and instaled it today. The old one was black with carbon. All powderly. Then as I reved the engine, I could see black smoke comen outa the pipes. I looked at my tailgate, and it has a black powder film on it. Inside pipes are like chalk. And I even found black streaks behind both pipes on the concrete. Oh and I put a hand in front of the pipe and got splatters of black on it.
Whats the deal? Is the 6er about to kick the crapper? man I hope not. Or bad gas? Or with a new O2 sensor will it clear up after a day or to. My gas milage has been crap lately too. Hope one of you has a remedy for me. Thanks
Joe E.
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ScojoDak
Dodge Dakota
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9/05/2003
14:58:44
| RE: major carbon buildup in exhaust..
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Fuel injector cleaner comes to mind.
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buck
Dodge Dakota
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9/05/2003
21:14:08
| RE: major carbon buildup in exhaust..
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Gut the Cat....That should take care of your problem
Buck
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Joe E.
Dodge Dakota
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9/05/2003
22:17:20
| RE: major carbon buildup in exhaust..
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Yeah I plan to get a set of cleaners. Lucas treatment for the gas. TB cleaner. I run injector cleaner about a third of the time. Later.
Joe E.
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catman
Dodge Dakota
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9/07/2003
04:17:19
| RE: major carbon buildup in exhaust..
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OMG another moron thinks that removing the cat will cure what is more likely a bad carb or a need of a tuneup or a bad pcm or a bad sensor. Might even be bad plugs or a timing issue. worst case is a burned exhaust valve. "gut the cat" what an idiot, you make me laugh.
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buck
Dodge Dakota
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9/07/2003
09:40:46
| RE: major carbon buildup in exhaust..
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hey Catman....you think its a carb problem huh??? Pretty safe bet that its not. Not on a fuel injected truck. A '90 is past due for a cat problem. I had the same thing happen on my 90. The cat gets pluged and will burn the diverter valves out in no time. Nice to know all the chickens who are afraid to post their real name. Just jump post to post with a different name. Probably the same dick who messed with Larry.
Buck
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jdllizard
Dodge Dakota
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9/07/2003
11:37:29
| RE: major carbon buildup in exhaust..
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Sounds like the cat to me.
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Joe E.
Dodge Dakota
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9/07/2003
17:21:33
| RE: major carbon buildup in exhaust..
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Thanks for the comments guys. I havent had a cat for over 2 years now. Just starting having problems. so its not a bad cat. Or a bad card!!! hahahahaha. I got some trecron additive. And Im gonna clean out the TB. Maybe that will help. And installed the new O2 sensor already. That helped alot. But it still is blowing blacksoot out. Thanks again.
Joe E.
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buck
Dodge Dakota
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9/07/2003
17:42:50
| RE: major carbon buildup in exhaust..
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How about the air diverter valves ??? Try this if you havent already. Take the belt off of the air pump and see if that helps at all. I had a bad diverter and it puffed some black smoke. I ended up just cutting the belt on my air pump and that took care of it. Keep us posted
Buck
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Joe E.
Dodge Dakota
JOIN HERE
9/07/2003
17:47:06
| RE: major carbon buildup in exhaust..
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Funny thing is I cut that belt when I got the exhaust done 2 years ago. Cant be that. What the air diverter valves? What about ATI or something? Thanks
Joe E.
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buck
Dodge Dakota
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9/07/2003
21:19:54
| RE: major carbon buildup in exhaust..
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The diverter valves are at the front of the engine by the air pump. Does the comp throw any codes?
Buck
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EBL
Dodge Dakota
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9/07/2003
21:32:02
| RE: major carbon buildup in exhaust..
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Have you checked your EGR valve?
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Joe E.
Dodge Dakota
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9/07/2003
22:27:02
| RE: major carbon buildup in exhaust..
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na computer throws no codes. How do I check these valves? What about egr? What is it and how do I check it? Thanks
Joe E.
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EBL
Dodge Dakota
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9/08/2003
12:54:32
| RE: major carbon buildup in exhaust..
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The EGR valve pulls exhaust gas from your exhaust manifold and throws it into your intake manifold. This effectively makes the volume of your engine smaller and your emissions smaller also. The spent gasses are innert and won't burn again.
Sometimes they can foul up with carbon. I had an EGR valve go back in '93 or so and the car would run fine one minute and be spitting carbon and running like crap the next. It's probably a long shot, but worth checking.
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Joe E.
Dodge Dakota
JOIN HERE
9/08/2003
12:57:29
| RE: major carbon buildup in exhaust..
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Thanks. I have 2 chilton/hayes manuals Ill check to see about it. Thanks again.
Joe E.
however, I have run it hard the last few days. Espically today. And it is running alot better. Im gonna check the carbon inexhaust later. Thanks
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Jon
Dodge Dakota
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11/26/2005
00:09:19
| RE: major carbon buildup in exhaust..
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I have the same problem on my 95' gmc sierra i recently changed the O2 sensor and it is still puffing out black smoke, did you ever get rid of yours and if you did what was it?
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toolfan
GenIII
11/26/2005
01:10:10
| RE: major carbon buildup in exhaust..
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jon
i think that the guy will probably not respond looking at the date of the post.
if its a GMC than the engine is probably past its prime. i would do a tune up.
my toyota use to blow oil out the tale pipe but that little 4 cylinder never blow just burn oil faster than i could refill it.
and some mods to slow it down!
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OBIO3
Dodge Dakota
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11/26/2005
15:00:05
| RE: major carbon buildup in exhaust..
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Just stop and think a bit jon > If blue is oil , black is............... gas > Your running very rich > Get your book out and stsrt checking things that cause a rich problem > How many miles on this engine > What kind of care (service) has it had during it's life > I see no reason to think the engine is shot > At the very worst it could be bad valves > But then you never said how many miles on it > Might be 300,000 plus for all I know >
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Super bee
GenI
11/26/2005
20:23:44
| RE: major carbon buildup in exhaust..
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wonder what ever happned to Joe anyway
he used to post all the time
a genI is awesome with a 318 ;-)
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