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Old 08-20-2011, 09:59 PM   #1
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black/grey smoke coming out of my exhaust pipes

im having what my family believes is a problem.. i was driving the other day with my family in the car behind me and as i was stopped at multiple lights, (idle) they said they noticed black/grey smoke coming out of my exhaust pipes.. i have the 3.6L v6 stock exhaust no additions to the exhaust or the engine at all.. i plan to take it to a dealer to have it looked at but every dealer in my area is shit. so if anyone has experienced this or knows something about this problem id appreciate your input. thanks
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Old 08-20-2011, 10:01 PM   #2
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Never had this happen to me, but if you take it to the dealer i know that it will be fixed.
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Old 08-20-2011, 10:03 PM   #3
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Never had this happen to me, but if you take it to the dealer i know that it will be fixed.
yeah im trying to find a good one right now to take it to.. thanks
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Old 08-20-2011, 10:03 PM   #4
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Could be carbon. Maybe just running a little rich. Shouldn't be anything to worry about. Dealer should take care of it> Are your exhaust tips black with carbon?
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Old 08-20-2011, 10:05 PM   #5
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Could be carbon. Maybe just running a little rich. Shouldn't be anything to worry about. Dealer should take care of it> Are your exhaust tips black with carbon?
no they are just the stock ones.. thats why i thought this whole thing was odd..i could understand having complications if i had aftermarket stuff.. but i dont. AND the car only has merely 3,700 miles..
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Old 08-20-2011, 10:06 PM   #6
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Run it up until it squeals into second a few times.

Do this every day.
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Old 08-20-2011, 10:08 PM   #7
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Run it up until it squeals into second a few times.

Do this every day.
sorry i appreciate your advice but im not sure i understand what you mean by this..?
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Old 08-20-2011, 10:31 PM   #8
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no they are just the stock ones.. thats why i thought this whole thing was odd..i could understand having complications if i had aftermarket stuff.. but i dont. AND the car only has merely 3,700 miles..
I think he meant for you to wipe the inside of your exhaust tips and see if there is any black residue inside. If so, your engine is burning fuel rich (results in excess carbon showing up in the exhaust).
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Old 08-20-2011, 10:37 PM   #9
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I think he meant for you to wipe the inside of your exhaust tips and see if there is any black residue inside. If so, your engine is burning fuel rich (results in excess carbon showing up in the exhaust).
ohh! sorry. okay i did that and YES they are very black inside.. so you say my engine burns fuel rich.. so is this something i should be concerned about? or is there anything a dealer could do for me? thanks i appreciate your advice.
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Old 08-20-2011, 10:52 PM   #10
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Shouldn't be a big deal. Take it to a dealer and let them run a check. May just be a bad sensor of some sort.
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Old 08-20-2011, 10:54 PM   #11
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Have you checked your oil level lately?

Sounds like to me its burning oil.
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Old 08-20-2011, 10:56 PM   #12
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Have you checked your oil level lately?

Sounds like to me its burning oil.
well what pisses me off is that i got my oil changed at 3,400 miles.. i now have about 3,700.. and when i got home from picking my car up i noticed the engine cover was loose.. very bad experience horrible dealership and my camaro will never go back there. but now im not sure what to do..
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Old 08-20-2011, 11:41 PM   #13
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You can go to any GM dealer. Doesn't have to be Chevy.

Shouldn't even have to be GM if the shop calls and gets approval.
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Old 08-20-2011, 11:59 PM   #14
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Originally Posted by TJ's MARO View Post
well what pisses me off is that i got my oil changed at 3,400 miles.. i now have about 3,700.. and when i got home from picking my car up i noticed the engine cover was loose.. very bad experience horrible dealership and my camaro will never go back there. but now im not sure what to do..
I don't know what it is with Chevy dealers but most of them are horrible! I've always taken my Chevys/other GM products to Cadillac dealers, they usually do a somewhat decent job there!

Hope you get your issue resolved TJ! Try driving to empty and then filling up with 89 octane rather than 87 and then disconnect your battery overnight to reset the ECU and see if the car stops running rich
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Old 08-21-2011, 07:07 AM   #15
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double check your oil level to be safe.

But the LLT runs rich....I wouldn't worry too much if the car runs well.
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Old 08-21-2011, 08:02 AM   #16
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You would be burning oil if blue smoke was coming out of the rear.
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Old 08-21-2011, 08:54 AM   #17
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Condensation burning off after the cats and exhaust got hot? Maybe?

Was it within a couple miles of a cold start? Did it evaporate?

Smoke will drift away as smoke. Steam/condensation will only make it a short distance from the pipes.
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Old 08-21-2011, 09:20 AM   #18
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maybe if you told us where you lived - not your address but just your town or area - another member might have a suggestion for a reputable dealer in your area. just a thought.
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Old 08-21-2011, 11:25 AM   #19
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Originally Posted by B1G-AL View Post
I don't know what it is with Chevy dealers but most of them are horrible! I've always taken my Chevys/other GM products to Cadillac dealers, they usually do a somewhat decent job there!

Hope you get your issue resolved TJ! Try driving to empty and then filling up with 89 octane rather than 87 and then disconnect your battery overnight to reset the ECU and see if the car stops running rich
Thanks Al! I'm gonna put in some 89 next time I fill it up.
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Old 08-21-2011, 11:27 AM   #20
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Condensation burning off after the cats and exhaust got hot? Maybe?

Was it within a couple miles of a cold start? Did it evaporate?

Smoke will drift away as smoke. Steam/condensation will only make it a short distance from the pipes.
It was not after a cold start, but 2 other people I talked to mentioned the condensation thing also. So perhaps thats what it is
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Old 08-21-2011, 11:34 AM   #21
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The LLT does tend to run a little rich and those stock mufflers like to hold onto condensation so steam is pretty common.
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Old 08-21-2011, 05:05 PM   #22
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The LLT does tend to run a little rich and those stock mufflers like to hold onto condensation so steam is pretty common.
Alright thanks!
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Old 08-21-2011, 06:03 PM   #23
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FWIW, my SS tailpipes are BLACK inside, but the oil stays clean and gas mileage is 23 mpg.

Warm up your car, then check the exhaust.

A little rich is better than too lean.
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Old 08-21-2011, 06:35 PM   #24
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My pops said he saw black smoke coming out of my pipes, a couple weeks later my engine was blown! Do you have any rattling?
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