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Old 05-27-2013, 08:40 PM   #12
OldScoolCamaro


 
Drives: Camaro's, always have, always will.
Join Date: Oct 2010
Location: Home of the brave
Posts: 4,851
..it's carbon buildup in the factory exhaust system....it's need to not idle so much, not be be thought of like a passenger vehicle, or babied. It will build up and accumulate carbon over time unless one stands on it and blows it out of the system. That, or it's throwing a CEL for running rich.
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