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Is black buildup on exhaust tips sign of running rich? or gutted precats?

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Old 03-31-2007, 06:41 PM
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Is black buildup on exhaust tips sign of running rich? or gutted precats?
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Old 03-31-2007, 06:47 PM
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I get a slight buildup....not gutted....and no "rich" codes.
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Old 03-31-2007, 06:48 PM
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Rich. check block 32 on VAG.
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Old 03-31-2007, 06:53 PM
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I dont have any way to check the vag. My car is stage 2+ but I am still Stage 1
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