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I have JRSC (c30 with default pulley) installed on a stock engine (stock header, injectors, fuel pump, etc) with CARB tune. I am interested in Delicious tune because the CARB tune does not seem to perform well in colder weather. I can understand that hot or cold temperature can affect the performance (power) but the engine should still be smooth at least. The engine feels different on a cold day in the same week with the same gas in the tank. Do you think Delicious tune can help? If I order Flash & Go tune, do I need to replace the MAP sensor?
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