Exhaust tips turning black

[Deleted member 12951]

Are you running an oil separator?

I am not

---------- Post added at 06:28 PM ---------- Previous post was at 06:25 PM ----------

I think it's called carbon.

Thanks, just thought it wouldn't hurt to ask. Seems more than typical but then again this is one of the larger engines I've owned and didn't know if a tune made that much difference. Reading up on black smoke it typically means your fuel is running rich and burning excess gas. If this is normal, then I am perfectly fine and will clean my pipes.

 

[Bulletnjm]

Haha your fine my BMW appears to be a diesel, except its gas lol

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[Chris's FX4]

Oil blow by could also be adding to it, which is why I asked about the oil separator.

 

[NickPic83]

I have a separator and still get it


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[gDMJoe]

*** (Working As Designed) and normal.

Reader's Digest explanation ... At start-up the PCM puts the fuel mixture into rich mode until it determines there's been warm-up. As the result the rich mixture causes carbon-buildup which shows-up on the exhaust tips and/or tailpipe.

It will be more prevalent in cold weather.
.

 

[Ruger]

What is this carbon you speak of?

Damn, but that's funny. I laughed like a crazy person!

 

[mudblood]

Frankly it may not be burning your fuel effeciently. I would first check the gas and octane your using. Do you always use the same gas at the same station. Do you use top tier gas? Do you have an aftermarket tune? Have you had it checked at the dealer? A clean burning engine does NOT leave large carbon deposits on exhaust. You have a reason to be somewhat concerned.

 

[Deleted member 12951]

Gas: the majority of the time yes except when traveling. Always go to Conoco and use either 87 or 93 as I said in my original post.
Yes I have a tune as I said in my original post.
No I have not taken it to the dealer as I am asking here first to see what others say if it is common or not. I had carbon before the tune but didn't think much of it as it wasn't noticeable on the stock exhaust as much as it is on my Ford Racing Touring catback exhaust.

 

[mudblood]

Gas: the majority of the time yes except when traveling. Always go to Conoco and use either 87 or 93 as I said in my original post.
Yes I have a tune as I said in my original post.
No I have not taken it to the dealer as I am asking here first to see what others say if it is common or not. I had carbon before the tune but didn't think much of it as it wasn't noticeable on the stock exhaust as much as it is on my Ford Racing Touring catback exhaust.

As far as I know Conoco is not a top tier gas but have not checked in some time. Simply not sure if a cat back could make that much difference. An aftermarket tune certainly could. The dealer can put it on the computer and get a good idea how efficient the engine is operating. My pipes are as clean as a pin without any carbon deposits. I always use a top tier gas, do not have an aftermarket tune and have an aftermarket cat back (stainless works). Back in the old days folks said to open it up once in a while to "blow out the carbon". Frankly I doubt if that would do much. Do you do a lot of stop and go driving as that could impact the efficiency. Very Light carbon ( simple black soot) in the exhaust is not that big a deal but heavy deposits is not a good thing. You should certainly look into it.

 

[Jimbo]

Conoco is on the list currently.


Top Tier Gasoline