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2002 jeep liberty
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Discussion Starter · #1 ·
I am have issues with black residue behind vehicle on ground from exhaust , and ideas or help would be great
 

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The beast from Brazil
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8,310 Posts
I presume that it is a petrol engine?
If so, it is probably running too rich. Do you have any trouble code set?
If you have a scanner with live data, check the fuel trim figures. (STFT and LTFT) and let us know what they read.
 
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