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Old 06-08-2013, 10:07 PM
Warlock III Warlock III is offline
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In addition to what GR said. The soot is unburned fuel (hydrocarbon) and it's usually caused by running too rich. The ECM SHOULD be adjusting for it but it may be an indication that an O2 sensor is on its way out.

Keep that in mind if you start getting a CEL.
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