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Old 10-23-2009, 10:28 PM
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really sooty exhaust

i noticed today when i was out in a field working i fired the jeep up and went around back to load tools, that there was a the normal steam coming out when its 45*, but the water dripping out of the pipe was completely black.

Could that mean that the jeep is running too rich and is the reason i am getting the 13-15 mpg?
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Old 10-23-2009, 10:31 PM   #2
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Quote:
Originally Posted by crazyredneck View Post
i noticed today when i was out in a field working i fired the jeep up and went around back to load tools, that there was a the normal steam coming out when its 45*, but the water dripping out of the pipe was completely black.

Could that mean that the jeep is running too rich and is the reason i am getting the 13-15 mpg?
May wanna check the O2 sensors...it's possible...

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Old 10-23-2009, 10:32 PM   #3
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The black water is probably caused by the soot in the tail pipe, no worries in my opinion. just my .02
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Old 10-24-2009, 10:22 PM
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The black water is probably caused by the soot in the tail pipe, no worries in my opinion. just my .02
sorry to be an ass... but no shit...


the question is, would it be from running rich which is why im not getting the gas mileage i should be, and what would cause that without a CEL?
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Old 10-24-2009, 11:10 PM   #5
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Originally Posted by crazyredneck View Post
sorry to be an ass... but no shit...


the question is, would it be from running rich which is why im not getting the gas mileage i should be, and what would cause that without a CEL?
I'm by no means a Jeep expert, but a "lazy" O2 sensor can cause a vehicle to run rich without a CEL on many vehicle...basically it's a sensor that's functioning, but it isn't functioning like it should be.

Now as was also mentioned, this could be completely normal as well...I don't know. That's why I recommend having the O2's checked (just in case)...but not necessarily saying they need replaced.
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Old 10-25-2009, 10:11 AM   #6
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my 06 x is averaging 18mpg & my exhaust does the same thing.

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