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Q: Ilde speed on 2009 Toyota Camry

When I turn the a/c on my idle speed slows down and the car starts to shake, the rpm drops to about 700 to 750 rpm's. took it to toyota dealership and they hooked it up to computer and everything checked out ok, they said they would just leave the work order open and if they find something to fix it they would call me. Can you suggest anything that I can do to fix this problem?
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On the older Camry the engine had an idle air control valve under the throttle housing that used to get carbon fouled and cause a similar problem to what you describe. The later Camry has gone to a electronic controlled throttle body. Call around other Toyota dealers (even in other cities) as for their service department as them if they have seen this problem on any vehicles they have sold?
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