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Old 11-30-2009, 10:17 AM   #1
monza66mo
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L99 running rich after minor mods?

CAI and cat backs is all I've done but I noticed that there is a lot of black powdery exhaust residue inside my tips. Anyone care to speculate on this?
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Old 11-30-2009, 10:29 AM   #2
Dakota Kid

 
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My L99 is stock, but noticed the same.
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Old 11-30-2009, 10:34 AM   #3
JANNETTYRACING

 
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Quote:
Originally Posted by monza66mo View Post
CAI and cat backs is all I've done but I noticed that there is a lot of black powdery exhaust residue inside my tips. Anyone care to speculate on this?
That is Perfectly normal for Unleaded fuel, would be gray if you had race gas.

Although these cars are a bit rich to begin with.

Ted.
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Old 11-30-2009, 11:56 AM   #4
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Yup, mine is the same. That's completely natural.
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