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When you're done do the idle relearn procedure. Drop the negative battery terminal off for 15 minutes, then put it back and start the engine with everything off, including AC, and let it idle for 5 minutes. Then turn on AC for 1 minute and you're good to go.
Any cutting to enhance the effectiveness of the blackwing? Has anyone also used the blackwing lid that covers the filter? If so, notice any differences?