Q: I changed knock sensors on 2002 avalanche which also has after market Whipple charger .now it idles at 2000 rpm could it be the IA

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I changed knock sensors on 2002 avalanche z71 with 5.3 l .which has a Whipple charger on it. Now it idles at 2000 rpm .I have cleaned throttle body that had no effect .what else can I do to correct this problem?
My car has an automatic transmission.

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