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Join Date: Nov 2006
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you should be getting no readings from the knock sensors, Idle or otherwise. The knock sensors should only go off if there is a problem with pinging, or if the sensors are bad. Seeing that both of the sensors are picking up knocking, I would take it to the dealer.
I have a similar problem with my truck, but it is only on one of the two sensors. My PCM retards timing via knock retard consistantly when I start the car first thing in the morning. I have found that if I start the jeep, let it idle for about a minute, and then restart the truck, the knock retard goes away, even though one of the knock sensors still indicates knocking.
I plan on taking mine to the dealer sometime this week. I'll post my results when I get the truck back.