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Old 02-02-2009, 05:17 PM   #1
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lots of carbon

so every morning when i go out and start my jeep it pours carbon all over the ground. my muffler is full of it. no i am not burning oil. i use mobil 1 syn and it's never down even a quarter of a quart. my plugs are black as well.
is this a rich running condition? how would i fix such an issue? or am i way off base?

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Old 02-02-2009, 05:39 PM   #2
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have you cleaned your fuel injectors recently?

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Old 02-02-2009, 05:59 PM   #3
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i run a can of seafoam through every 3000 miles
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Old 02-02-2009, 06:07 PM   #4
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How old is your muffler?
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Old 02-02-2009, 06:30 PM   #5
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i replaced the complete exhaust system back in oct. except the exhaust manifold. i bought the mopar down pipe with 2 mini cats and put a random tech high flow cat in the rear and a 40 series flow master on it too.
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Old 02-02-2009, 06:31 PM   #6
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i also replaced all 4 o2 sensors in oct. as well.
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Old 02-02-2009, 10:08 PM   #7
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Id check your plugs. Mopar engines always run rich. not to mention your motor will always run rich when you first turn it on.
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Old 02-03-2009, 08:51 AM   #8
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you're running way too rich. are all the plugs equally black? i would suspect the aftermarket cat(s) arent doing all they're sposed to and throwing your o2 sensors for some crazy signal.
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Old 02-04-2009, 08:26 AM   #9
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how could i correct this problem? i would like it to be fixed soon.
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Old 02-04-2009, 09:05 AM   #10
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Maybe

I've heard the heat from the cat can build up to much and kill the o2 sensor there could be that? Maybe the fuel injectors or the seal around them I had a buddy that dinged one of his o-rings on just one injector and it was spilling fuel right out of the muffler(it was a ford ranger).
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Old 02-04-2009, 10:16 AM   #11
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It could be because you're now driving extremely conservatively now.... as in not revving your engine hard or to high rpms in the weather conditions you're having there in Mass (to avoid sliding on the icy roads). That can load an engine with carbon.

I'd also stop wasting your $$$ by running Sea Foam through your engine every 3000 miles. It doesn't need it and you're not doing your engine any favors by doing that.

Now your engine might be running rich, if it is at all, from a bad upstream 02 sensor. It's the upstream 02 sensor that sets the air/fuel ratio.

Finally, it is normal for a muffler to drip moisture and that it could be sooty could just be some carbon from having to drive the engine so conservatively right now. You might try revving the engine hard to high rpms whenever possible over a few days, that might help to blow out any carbon that could be in the combustion chambers.

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