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So far no tuner has chimed in.
In theory, cold start does not reduce the amount of fuel being dumped into and out of the engine during engine warm up. Cold start decreases the time it takes to warm up the cats.
However, If the cats do not catalyze 100% for a long period of time, can they be clogged, or plugged? No one really researched this - at least I haven't seen any factual data. Its only a theory at this point.
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